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132d6d73ea024beab3df99df2ecf4d345995fdfd
clang-p2996/llvm/test/Transforms/HardwareLoops/scalar-while.ll
David Green b2ac9681a7 [ARM] Alter t2DoLoopStart to define lr 
This changes the definition of t2DoLoopStart from
t2DoLoopStart rGPR
to
GPRlr = t2DoLoopStart rGPR

This will hopefully mean that low overhead loops are more tied together,
and we can more reliably generate loops without reverting or being at
the whims of the register allocator.

This is a fairly simple change in itself, but leads to a number of other
required alterations.

 - The hardware loop pass, if UsePhi is set, now generates loops of the
   form:
       %start = llvm.start.loop.iterations(%N)
     loop:
       %p = phi [%start], [%dec]
       %dec = llvm.loop.decrement.reg(%p, 1)
       %c = icmp ne %dec, 0
       br %c, loop, exit
 - For this a new llvm.start.loop.iterations intrinsic was added, identical
   to llvm.set.loop.iterations but produces a value as seen above, gluing
   the loop together more through def-use chains.
 - This new instrinsic conceptually produces the same output as input,
   which is taught to SCEV so that the checks in MVETailPredication are not
   affected.
 - Some minor changes are needed to the ARMLowOverheadLoop pass, but it has
   been left mostly as before. We should now more reliably be able to tell
   that the t2DoLoopStart is correct without having to prove it, but
   t2WhileLoopStart and tail-predicated loops will remain the same.
 - And all the tests have been updated. There are a lot of them!

This patch on it's own might cause more trouble that it helps, with more
tail-predicated loops being reverted, but some additional patches can
hopefully improve upon that to get to something that is better overall.

Differential Revision: https://reviews.llvm.org/D89881
2020-11-10 15:57:58 +00:00

970 lines
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -hardware-loops -force-hardware-loops=true -hardware-loop-decrement=1 -hardware-loop-counter-bitwidth=32 -S %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-DEC
; RUN: opt -hardware-loops -force-hardware-loops=true -hardware-loop-decrement=1 -hardware-loop-counter-bitwidth=32 -force-hardware-loop-phi=true -S %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-PHI
; RUN: opt -hardware-loops -force-hardware-loops=true -hardware-loop-decrement=1 -hardware-loop-counter-bitwidth=32 -force-nested-hardware-loop=true -S %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-NESTED
; RUN: opt -hardware-loops -force-hardware-loops=true -hardware-loop-decrement=1 -hardware-loop-counter-bitwidth=32 -force-hardware-loop-guard=true -S %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-GUARD
; RUN: opt -hardware-loops -force-hardware-loops=true -hardware-loop-decrement=1 -hardware-loop-counter-bitwidth=32 -force-hardware-loop-phi=true -force-hardware-loop-guard=true -S %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-PHIGUARD
define void @while_lt(i32 %i, i32 %N, i32* nocapture %A) {
; CHECK-DEC-LABEL: @while_lt(
; CHECK-DEC-NEXT: entry:
; CHECK-DEC-NEXT: [[CMP4:%.*]] = icmp ult i32 [[I:%.*]], [[N:%.*]]
; CHECK-DEC-NEXT: br i1 [[CMP4]], label [[WHILE_BODY_PREHEADER:%.*]], label [[WHILE_END:%.*]]
; CHECK-DEC: while.body.preheader:
; CHECK-DEC-NEXT: [[TMP0:%.*]] = sub i32 [[N]], [[I]]
; CHECK-DEC-NEXT: call void @llvm.set.loop.iterations.i32(i32 [[TMP0]])
; CHECK-DEC-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-DEC: while.body:
; CHECK-DEC-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[INC:%.*]], [[WHILE_BODY]] ], [ [[I]], [[WHILE_BODY_PREHEADER]] ]
; CHECK-DEC-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-DEC-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-DEC-NEXT: [[INC]] = add nuw i32 [[I_ADDR_05]], 1
; CHECK-DEC-NEXT: [[TMP1:%.*]] = call i1 @llvm.loop.decrement.i32(i32 1)
; CHECK-DEC-NEXT: br i1 [[TMP1]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-DEC: while.end:
; CHECK-DEC-NEXT: ret void
;
; CHECK-PHI-LABEL: @while_lt(
; CHECK-PHI-NEXT: entry:
; CHECK-PHI-NEXT: [[CMP4:%.*]] = icmp ult i32 [[I:%.*]], [[N:%.*]]
; CHECK-PHI-NEXT: br i1 [[CMP4]], label [[WHILE_BODY_PREHEADER:%.*]], label [[WHILE_END:%.*]]
; CHECK-PHI: while.body.preheader:
; CHECK-PHI-NEXT: [[TMP0:%.*]] = sub i32 [[N]], [[I]]
; CHECK-PHI-NEXT: [[TMP1:%.*]] = call i32 @llvm.start.loop.iterations.i32(i32 [[TMP0]])
; CHECK-PHI-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-PHI: while.body:
; CHECK-PHI-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[INC:%.*]], [[WHILE_BODY]] ], [ [[I]], [[WHILE_BODY_PREHEADER]] ]
; CHECK-PHI-NEXT: [[TMP2:%.*]] = phi i32 [ [[TMP1]], [[WHILE_BODY_PREHEADER]] ], [ [[TMP3:%.*]], [[WHILE_BODY]] ]
; CHECK-PHI-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-PHI-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-PHI-NEXT: [[INC]] = add nuw i32 [[I_ADDR_05]], 1
; CHECK-PHI-NEXT: [[TMP3]] = call i32 @llvm.loop.decrement.reg.i32(i32 [[TMP2]], i32 1)
; CHECK-PHI-NEXT: [[TMP4:%.*]] = icmp ne i32 [[TMP3]], 0
; CHECK-PHI-NEXT: br i1 [[TMP4]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-PHI: while.end:
; CHECK-PHI-NEXT: ret void
;
; CHECK-NESTED-LABEL: @while_lt(
; CHECK-NESTED-NEXT: entry:
; CHECK-NESTED-NEXT: [[CMP4:%.*]] = icmp ult i32 [[I:%.*]], [[N:%.*]]
; CHECK-NESTED-NEXT: br i1 [[CMP4]], label [[WHILE_BODY_PREHEADER:%.*]], label [[WHILE_END:%.*]]
; CHECK-NESTED: while.body.preheader:
; CHECK-NESTED-NEXT: [[TMP0:%.*]] = sub i32 [[N]], [[I]]
; CHECK-NESTED-NEXT: call void @llvm.set.loop.iterations.i32(i32 [[TMP0]])
; CHECK-NESTED-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-NESTED: while.body:
; CHECK-NESTED-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[INC:%.*]], [[WHILE_BODY]] ], [ [[I]], [[WHILE_BODY_PREHEADER]] ]
; CHECK-NESTED-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-NESTED-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-NESTED-NEXT: [[INC]] = add nuw i32 [[I_ADDR_05]], 1
; CHECK-NESTED-NEXT: [[TMP1:%.*]] = call i1 @llvm.loop.decrement.i32(i32 1)
; CHECK-NESTED-NEXT: br i1 [[TMP1]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-NESTED: while.end:
; CHECK-NESTED-NEXT: ret void
;
; CHECK-GUARD-LABEL: @while_lt(
; CHECK-GUARD-NEXT: entry:
; CHECK-GUARD-NEXT: [[CMP4:%.*]] = icmp ult i32 [[I:%.*]], [[N:%.*]]
; CHECK-GUARD-NEXT: [[TMP0:%.*]] = sub i32 [[N]], [[I]]
; CHECK-GUARD-NEXT: br i1 [[CMP4]], label [[WHILE_BODY_PREHEADER:%.*]], label [[WHILE_END:%.*]]
; CHECK-GUARD: while.body.preheader:
; CHECK-GUARD-NEXT: call void @llvm.set.loop.iterations.i32(i32 [[TMP0]])
; CHECK-GUARD-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-GUARD: while.body:
; CHECK-GUARD-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[INC:%.*]], [[WHILE_BODY]] ], [ [[I]], [[WHILE_BODY_PREHEADER]] ]
; CHECK-GUARD-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-GUARD-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-GUARD-NEXT: [[INC]] = add nuw i32 [[I_ADDR_05]], 1
; CHECK-GUARD-NEXT: [[TMP1:%.*]] = call i1 @llvm.loop.decrement.i32(i32 1)
; CHECK-GUARD-NEXT: br i1 [[TMP1]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-GUARD: while.end:
; CHECK-GUARD-NEXT: ret void
;
; CHECK-PHIGUARD-LABEL: @while_lt(
; CHECK-PHIGUARD-NEXT: entry:
; CHECK-PHIGUARD-NEXT: [[CMP4:%.*]] = icmp ult i32 [[I:%.*]], [[N:%.*]]
; CHECK-PHIGUARD-NEXT: [[TMP0:%.*]] = sub i32 [[N]], [[I]]
; CHECK-PHIGUARD-NEXT: br i1 [[CMP4]], label [[WHILE_BODY_PREHEADER:%.*]], label [[WHILE_END:%.*]]
; CHECK-PHIGUARD: while.body.preheader:
; CHECK-PHIGUARD-NEXT: [[TMP1:%.*]] = call i32 @llvm.start.loop.iterations.i32(i32 [[TMP0]])
; CHECK-PHIGUARD-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-PHIGUARD: while.body:
; CHECK-PHIGUARD-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[INC:%.*]], [[WHILE_BODY]] ], [ [[I]], [[WHILE_BODY_PREHEADER]] ]
; CHECK-PHIGUARD-NEXT: [[TMP2:%.*]] = phi i32 [ [[TMP1]], [[WHILE_BODY_PREHEADER]] ], [ [[TMP3:%.*]], [[WHILE_BODY]] ]
; CHECK-PHIGUARD-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-PHIGUARD-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-PHIGUARD-NEXT: [[INC]] = add nuw i32 [[I_ADDR_05]], 1
; CHECK-PHIGUARD-NEXT: [[TMP3]] = call i32 @llvm.loop.decrement.reg.i32(i32 [[TMP2]], i32 1)
; CHECK-PHIGUARD-NEXT: [[TMP4:%.*]] = icmp ne i32 [[TMP3]], 0
; CHECK-PHIGUARD-NEXT: br i1 [[TMP4]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-PHIGUARD: while.end:
; CHECK-PHIGUARD-NEXT: ret void
;
; CHECK-REGDEC-LABEL: @while_lt(
; CHECK-REGDEC-NEXT: entry:
; CHECK-REGDEC-NEXT: [[CMP4:%.*]] = icmp ult i32 [[I:%.*]], [[N:%.*]]
; CHECK-REGDEC-NEXT: br i1 [[CMP4]], label [[WHILE_BODY_PREHEADER:%.*]], label [[WHILE_END:%.*]]
; CHECK-REGDEC: while.body.preheader:
; CHECK-REGDEC-NEXT: [[TMP0:%.*]] = sub i32 [[N]], [[I]]
; CHECK-REGDEC-NEXT: [[TMP1:%.*]] = call i32 @llvm.start.loop.iterations.i32(i32 [[TMP0]])
; CHECK-REGDEC-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-REGDEC: while.body:
; CHECK-REGDEC-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[INC:%.*]], [[WHILE_BODY]] ], [ [[I]], [[WHILE_BODY_PREHEADER]] ]
; CHECK-REGDEC-NEXT: [[TMP2:%.*]] = phi i32 [ [[TMP1]], [[WHILE_BODY_PREHEADER]] ], [ [[TMP3:%.*]], [[WHILE_BODY]] ]
; CHECK-REGDEC-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-REGDEC-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-REGDEC-NEXT: [[INC]] = add nuw i32 [[I_ADDR_05]], 1
; CHECK-REGDEC-NEXT: [[TMP3]] = call i32 @llvm.loop.decrement.reg.i32(i32 [[TMP2]], i32 1)
; CHECK-REGDEC-NEXT: [[TMP4:%.*]] = icmp ne i32 [[TMP3]], 0
; CHECK-REGDEC-NEXT: br i1 [[TMP4]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-REGDEC: while.end:
; CHECK-REGDEC-NEXT: ret void
entry:
%cmp4 = icmp ult i32 %i, %N
br i1 %cmp4, label %while.body, label %while.end
while.body:
%i.addr.05 = phi i32 [ %inc, %while.body ], [ %i, %entry ]
%arrayidx = getelementptr inbounds i32, i32* %A, i32 %i.addr.05
store i32 %i.addr.05, i32* %arrayidx, align 4
%inc = add nuw i32 %i.addr.05, 1
%exitcond = icmp eq i32 %inc, %N
br i1 %exitcond, label %while.end, label %while.body
while.end:
ret void
}
define void @while_gt(i32 %i, i32 %N, i32* nocapture %A) {
; CHECK-DEC-LABEL: @while_gt(
; CHECK-DEC-NEXT: entry:
; CHECK-DEC-NEXT: [[CMP4:%.*]] = icmp sgt i32 [[I:%.*]], [[N:%.*]]
; CHECK-DEC-NEXT: br i1 [[CMP4]], label [[WHILE_BODY_PREHEADER:%.*]], label [[WHILE_END:%.*]]
; CHECK-DEC: while.body.preheader:
; CHECK-DEC-NEXT: [[TMP0:%.*]] = sub i32 [[I]], [[N]]
; CHECK-DEC-NEXT: call void @llvm.set.loop.iterations.i32(i32 [[TMP0]])
; CHECK-DEC-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-DEC: while.body:
; CHECK-DEC-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[DEC:%.*]], [[WHILE_BODY]] ], [ [[I]], [[WHILE_BODY_PREHEADER]] ]
; CHECK-DEC-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-DEC-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-DEC-NEXT: [[DEC]] = add nsw i32 [[I_ADDR_05]], -1
; CHECK-DEC-NEXT: [[TMP1:%.*]] = call i1 @llvm.loop.decrement.i32(i32 1)
; CHECK-DEC-NEXT: br i1 [[TMP1]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-DEC: while.end:
; CHECK-DEC-NEXT: ret void
;
; CHECK-PHI-LABEL: @while_gt(
; CHECK-PHI-NEXT: entry:
; CHECK-PHI-NEXT: [[CMP4:%.*]] = icmp sgt i32 [[I:%.*]], [[N:%.*]]
; CHECK-PHI-NEXT: br i1 [[CMP4]], label [[WHILE_BODY_PREHEADER:%.*]], label [[WHILE_END:%.*]]
; CHECK-PHI: while.body.preheader:
; CHECK-PHI-NEXT: [[TMP0:%.*]] = sub i32 [[I]], [[N]]
; CHECK-PHI-NEXT: [[TMP1:%.*]] = call i32 @llvm.start.loop.iterations.i32(i32 [[TMP0]])
; CHECK-PHI-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-PHI: while.body:
; CHECK-PHI-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[DEC:%.*]], [[WHILE_BODY]] ], [ [[I]], [[WHILE_BODY_PREHEADER]] ]
; CHECK-PHI-NEXT: [[TMP2:%.*]] = phi i32 [ [[TMP1]], [[WHILE_BODY_PREHEADER]] ], [ [[TMP3:%.*]], [[WHILE_BODY]] ]
; CHECK-PHI-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-PHI-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-PHI-NEXT: [[DEC]] = add nsw i32 [[I_ADDR_05]], -1
; CHECK-PHI-NEXT: [[TMP3]] = call i32 @llvm.loop.decrement.reg.i32(i32 [[TMP2]], i32 1)
; CHECK-PHI-NEXT: [[TMP4:%.*]] = icmp ne i32 [[TMP3]], 0
; CHECK-PHI-NEXT: br i1 [[TMP4]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-PHI: while.end:
; CHECK-PHI-NEXT: ret void
;
; CHECK-NESTED-LABEL: @while_gt(
; CHECK-NESTED-NEXT: entry:
; CHECK-NESTED-NEXT: [[CMP4:%.*]] = icmp sgt i32 [[I:%.*]], [[N:%.*]]
; CHECK-NESTED-NEXT: br i1 [[CMP4]], label [[WHILE_BODY_PREHEADER:%.*]], label [[WHILE_END:%.*]]
; CHECK-NESTED: while.body.preheader:
; CHECK-NESTED-NEXT: [[TMP0:%.*]] = sub i32 [[I]], [[N]]
; CHECK-NESTED-NEXT: call void @llvm.set.loop.iterations.i32(i32 [[TMP0]])
; CHECK-NESTED-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-NESTED: while.body:
; CHECK-NESTED-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[DEC:%.*]], [[WHILE_BODY]] ], [ [[I]], [[WHILE_BODY_PREHEADER]] ]
; CHECK-NESTED-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-NESTED-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-NESTED-NEXT: [[DEC]] = add nsw i32 [[I_ADDR_05]], -1
; CHECK-NESTED-NEXT: [[TMP1:%.*]] = call i1 @llvm.loop.decrement.i32(i32 1)
; CHECK-NESTED-NEXT: br i1 [[TMP1]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-NESTED: while.end:
; CHECK-NESTED-NEXT: ret void
;
; CHECK-GUARD-LABEL: @while_gt(
; CHECK-GUARD-NEXT: entry:
; CHECK-GUARD-NEXT: [[CMP4:%.*]] = icmp sgt i32 [[I:%.*]], [[N:%.*]]
; CHECK-GUARD-NEXT: [[TMP0:%.*]] = sub i32 [[I]], [[N]]
; CHECK-GUARD-NEXT: br i1 [[CMP4]], label [[WHILE_BODY_PREHEADER:%.*]], label [[WHILE_END:%.*]]
; CHECK-GUARD: while.body.preheader:
; CHECK-GUARD-NEXT: call void @llvm.set.loop.iterations.i32(i32 [[TMP0]])
; CHECK-GUARD-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-GUARD: while.body:
; CHECK-GUARD-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[DEC:%.*]], [[WHILE_BODY]] ], [ [[I]], [[WHILE_BODY_PREHEADER]] ]
; CHECK-GUARD-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-GUARD-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-GUARD-NEXT: [[DEC]] = add nsw i32 [[I_ADDR_05]], -1
; CHECK-GUARD-NEXT: [[TMP1:%.*]] = call i1 @llvm.loop.decrement.i32(i32 1)
; CHECK-GUARD-NEXT: br i1 [[TMP1]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-GUARD: while.end:
; CHECK-GUARD-NEXT: ret void
;
; CHECK-PHIGUARD-LABEL: @while_gt(
; CHECK-PHIGUARD-NEXT: entry:
; CHECK-PHIGUARD-NEXT: [[CMP4:%.*]] = icmp sgt i32 [[I:%.*]], [[N:%.*]]
; CHECK-PHIGUARD-NEXT: [[TMP0:%.*]] = sub i32 [[I]], [[N]]
; CHECK-PHIGUARD-NEXT: br i1 [[CMP4]], label [[WHILE_BODY_PREHEADER:%.*]], label [[WHILE_END:%.*]]
; CHECK-PHIGUARD: while.body.preheader:
; CHECK-PHIGUARD-NEXT: [[TMP1:%.*]] = call i32 @llvm.start.loop.iterations.i32(i32 [[TMP0]])
; CHECK-PHIGUARD-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-PHIGUARD: while.body:
; CHECK-PHIGUARD-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[DEC:%.*]], [[WHILE_BODY]] ], [ [[I]], [[WHILE_BODY_PREHEADER]] ]
; CHECK-PHIGUARD-NEXT: [[TMP2:%.*]] = phi i32 [ [[TMP1]], [[WHILE_BODY_PREHEADER]] ], [ [[TMP3:%.*]], [[WHILE_BODY]] ]
; CHECK-PHIGUARD-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-PHIGUARD-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-PHIGUARD-NEXT: [[DEC]] = add nsw i32 [[I_ADDR_05]], -1
; CHECK-PHIGUARD-NEXT: [[TMP3]] = call i32 @llvm.loop.decrement.reg.i32(i32 [[TMP2]], i32 1)
; CHECK-PHIGUARD-NEXT: [[TMP4:%.*]] = icmp ne i32 [[TMP3]], 0
; CHECK-PHIGUARD-NEXT: br i1 [[TMP4]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-PHIGUARD: while.end:
; CHECK-PHIGUARD-NEXT: ret void
;
; CHECK-REGDEC-LABEL: @while_gt(
; CHECK-REGDEC-NEXT: entry:
; CHECK-REGDEC-NEXT: [[CMP4:%.*]] = icmp sgt i32 [[I:%.*]], [[N:%.*]]
; CHECK-REGDEC-NEXT: br i1 [[CMP4]], label [[WHILE_BODY_PREHEADER:%.*]], label [[WHILE_END:%.*]]
; CHECK-REGDEC: while.body.preheader:
; CHECK-REGDEC-NEXT: [[TMP0:%.*]] = sub i32 [[I]], [[N]]
; CHECK-REGDEC-NEXT: [[TMP1:%.*]] = call i32 @llvm.start.loop.iterations.i32(i32 [[TMP0]])
; CHECK-REGDEC-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-REGDEC: while.body:
; CHECK-REGDEC-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[DEC:%.*]], [[WHILE_BODY]] ], [ [[I]], [[WHILE_BODY_PREHEADER]] ]
; CHECK-REGDEC-NEXT: [[TMP2:%.*]] = phi i32 [ [[TMP1]], [[WHILE_BODY_PREHEADER]] ], [ [[TMP3:%.*]], [[WHILE_BODY]] ]
; CHECK-REGDEC-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-REGDEC-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-REGDEC-NEXT: [[DEC]] = add nsw i32 [[I_ADDR_05]], -1
; CHECK-REGDEC-NEXT: [[TMP3]] = call i32 @llvm.loop.decrement.reg.i32(i32 [[TMP2]], i32 1)
; CHECK-REGDEC-NEXT: [[TMP4:%.*]] = icmp ne i32 [[TMP3]], 0
; CHECK-REGDEC-NEXT: br i1 [[TMP4]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-REGDEC: while.end:
; CHECK-REGDEC-NEXT: ret void
entry:
%cmp4 = icmp sgt i32 %i, %N
br i1 %cmp4, label %while.body, label %while.end
while.body:
%i.addr.05 = phi i32 [ %dec, %while.body ], [ %i, %entry ]
%arrayidx = getelementptr inbounds i32, i32* %A, i32 %i.addr.05
store i32 %i.addr.05, i32* %arrayidx, align 4
%dec = add nsw i32 %i.addr.05, -1
%cmp = icmp sgt i32 %dec, %N
br i1 %cmp, label %while.body, label %while.end
while.end:
ret void
}
define void @while_gte(i32 %i, i32 %N, i32* nocapture %A) {
; CHECK-DEC-LABEL: @while_gte(
; CHECK-DEC-NEXT: entry:
; CHECK-DEC-NEXT: [[CMP4:%.*]] = icmp slt i32 [[I:%.*]], [[N:%.*]]
; CHECK-DEC-NEXT: br i1 [[CMP4]], label [[WHILE_END:%.*]], label [[WHILE_BODY_PREHEADER:%.*]]
; CHECK-DEC: while.body.preheader:
; CHECK-DEC-NEXT: [[TMP0:%.*]] = add i32 [[I]], 1
; CHECK-DEC-NEXT: [[TMP1:%.*]] = sub i32 [[TMP0]], [[N]]
; CHECK-DEC-NEXT: call void @llvm.set.loop.iterations.i32(i32 [[TMP1]])
; CHECK-DEC-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-DEC: while.body:
; CHECK-DEC-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[DEC:%.*]], [[WHILE_BODY]] ], [ [[I]], [[WHILE_BODY_PREHEADER]] ]
; CHECK-DEC-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-DEC-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-DEC-NEXT: [[DEC]] = add nsw i32 [[I_ADDR_05]], -1
; CHECK-DEC-NEXT: [[TMP2:%.*]] = call i1 @llvm.loop.decrement.i32(i32 1)
; CHECK-DEC-NEXT: br i1 [[TMP2]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-DEC: while.end:
; CHECK-DEC-NEXT: ret void
;
; CHECK-PHI-LABEL: @while_gte(
; CHECK-PHI-NEXT: entry:
; CHECK-PHI-NEXT: [[CMP4:%.*]] = icmp slt i32 [[I:%.*]], [[N:%.*]]
; CHECK-PHI-NEXT: br i1 [[CMP4]], label [[WHILE_END:%.*]], label [[WHILE_BODY_PREHEADER:%.*]]
; CHECK-PHI: while.body.preheader:
; CHECK-PHI-NEXT: [[TMP0:%.*]] = add i32 [[I]], 1
; CHECK-PHI-NEXT: [[TMP1:%.*]] = sub i32 [[TMP0]], [[N]]
; CHECK-PHI-NEXT: [[TMP2:%.*]] = call i32 @llvm.start.loop.iterations.i32(i32 [[TMP1]])
; CHECK-PHI-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-PHI: while.body:
; CHECK-PHI-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[DEC:%.*]], [[WHILE_BODY]] ], [ [[I]], [[WHILE_BODY_PREHEADER]] ]
; CHECK-PHI-NEXT: [[TMP3:%.*]] = phi i32 [ [[TMP2]], [[WHILE_BODY_PREHEADER]] ], [ [[TMP4:%.*]], [[WHILE_BODY]] ]
; CHECK-PHI-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-PHI-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-PHI-NEXT: [[DEC]] = add nsw i32 [[I_ADDR_05]], -1
; CHECK-PHI-NEXT: [[TMP4]] = call i32 @llvm.loop.decrement.reg.i32(i32 [[TMP3]], i32 1)
; CHECK-PHI-NEXT: [[TMP5:%.*]] = icmp ne i32 [[TMP4]], 0
; CHECK-PHI-NEXT: br i1 [[TMP5]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-PHI: while.end:
; CHECK-PHI-NEXT: ret void
;
; CHECK-NESTED-LABEL: @while_gte(
; CHECK-NESTED-NEXT: entry:
; CHECK-NESTED-NEXT: [[CMP4:%.*]] = icmp slt i32 [[I:%.*]], [[N:%.*]]
; CHECK-NESTED-NEXT: br i1 [[CMP4]], label [[WHILE_END:%.*]], label [[WHILE_BODY_PREHEADER:%.*]]
; CHECK-NESTED: while.body.preheader:
; CHECK-NESTED-NEXT: [[TMP0:%.*]] = add i32 [[I]], 1
; CHECK-NESTED-NEXT: [[TMP1:%.*]] = sub i32 [[TMP0]], [[N]]
; CHECK-NESTED-NEXT: call void @llvm.set.loop.iterations.i32(i32 [[TMP1]])
; CHECK-NESTED-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-NESTED: while.body:
; CHECK-NESTED-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[DEC:%.*]], [[WHILE_BODY]] ], [ [[I]], [[WHILE_BODY_PREHEADER]] ]
; CHECK-NESTED-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-NESTED-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-NESTED-NEXT: [[DEC]] = add nsw i32 [[I_ADDR_05]], -1
; CHECK-NESTED-NEXT: [[TMP2:%.*]] = call i1 @llvm.loop.decrement.i32(i32 1)
; CHECK-NESTED-NEXT: br i1 [[TMP2]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-NESTED: while.end:
; CHECK-NESTED-NEXT: ret void
;
; CHECK-GUARD-LABEL: @while_gte(
; CHECK-GUARD-NEXT: entry:
; CHECK-GUARD-NEXT: [[CMP4:%.*]] = icmp slt i32 [[I:%.*]], [[N:%.*]]
; CHECK-GUARD-NEXT: br i1 [[CMP4]], label [[WHILE_END:%.*]], label [[WHILE_BODY_PREHEADER:%.*]]
; CHECK-GUARD: while.body.preheader:
; CHECK-GUARD-NEXT: [[TMP0:%.*]] = add i32 [[I]], 1
; CHECK-GUARD-NEXT: [[TMP1:%.*]] = sub i32 [[TMP0]], [[N]]
; CHECK-GUARD-NEXT: call void @llvm.set.loop.iterations.i32(i32 [[TMP1]])
; CHECK-GUARD-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-GUARD: while.body:
; CHECK-GUARD-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[DEC:%.*]], [[WHILE_BODY]] ], [ [[I]], [[WHILE_BODY_PREHEADER]] ]
; CHECK-GUARD-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-GUARD-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-GUARD-NEXT: [[DEC]] = add nsw i32 [[I_ADDR_05]], -1
; CHECK-GUARD-NEXT: [[TMP2:%.*]] = call i1 @llvm.loop.decrement.i32(i32 1)
; CHECK-GUARD-NEXT: br i1 [[TMP2]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-GUARD: while.end:
; CHECK-GUARD-NEXT: ret void
;
; CHECK-PHIGUARD-LABEL: @while_gte(
; CHECK-PHIGUARD-NEXT: entry:
; CHECK-PHIGUARD-NEXT: [[CMP4:%.*]] = icmp slt i32 [[I:%.*]], [[N:%.*]]
; CHECK-PHIGUARD-NEXT: br i1 [[CMP4]], label [[WHILE_END:%.*]], label [[WHILE_BODY_PREHEADER:%.*]]
; CHECK-PHIGUARD: while.body.preheader:
; CHECK-PHIGUARD-NEXT: [[TMP0:%.*]] = add i32 [[I]], 1
; CHECK-PHIGUARD-NEXT: [[TMP1:%.*]] = sub i32 [[TMP0]], [[N]]
; CHECK-PHIGUARD-NEXT: [[TMP2:%.*]] = call i32 @llvm.start.loop.iterations.i32(i32 [[TMP1]])
; CHECK-PHIGUARD-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-PHIGUARD: while.body:
; CHECK-PHIGUARD-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[DEC:%.*]], [[WHILE_BODY]] ], [ [[I]], [[WHILE_BODY_PREHEADER]] ]
; CHECK-PHIGUARD-NEXT: [[TMP3:%.*]] = phi i32 [ [[TMP2]], [[WHILE_BODY_PREHEADER]] ], [ [[TMP4:%.*]], [[WHILE_BODY]] ]
; CHECK-PHIGUARD-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-PHIGUARD-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-PHIGUARD-NEXT: [[DEC]] = add nsw i32 [[I_ADDR_05]], -1
; CHECK-PHIGUARD-NEXT: [[TMP4]] = call i32 @llvm.loop.decrement.reg.i32(i32 [[TMP3]], i32 1)
; CHECK-PHIGUARD-NEXT: [[TMP5:%.*]] = icmp ne i32 [[TMP4]], 0
; CHECK-PHIGUARD-NEXT: br i1 [[TMP5]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-PHIGUARD: while.end:
; CHECK-PHIGUARD-NEXT: ret void
;
; CHECK-REGDEC-LABEL: @while_gte(
; CHECK-REGDEC-NEXT: entry:
; CHECK-REGDEC-NEXT: [[CMP4:%.*]] = icmp slt i32 [[I:%.*]], [[N:%.*]]
; CHECK-REGDEC-NEXT: br i1 [[CMP4]], label [[WHILE_END:%.*]], label [[WHILE_BODY_PREHEADER:%.*]]
; CHECK-REGDEC: while.body.preheader:
; CHECK-REGDEC-NEXT: [[TMP0:%.*]] = add i32 [[I]], 1
; CHECK-REGDEC-NEXT: [[TMP1:%.*]] = sub i32 [[TMP0]], [[N]]
; CHECK-REGDEC-NEXT: [[TMP2:%.*]] = call i32 @llvm.start.loop.iterations.i32(i32 [[TMP1]])
; CHECK-REGDEC-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-REGDEC: while.body:
; CHECK-REGDEC-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[DEC:%.*]], [[WHILE_BODY]] ], [ [[I]], [[WHILE_BODY_PREHEADER]] ]
; CHECK-REGDEC-NEXT: [[TMP3:%.*]] = phi i32 [ [[TMP2]], [[WHILE_BODY_PREHEADER]] ], [ [[TMP4:%.*]], [[WHILE_BODY]] ]
; CHECK-REGDEC-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-REGDEC-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-REGDEC-NEXT: [[DEC]] = add nsw i32 [[I_ADDR_05]], -1
; CHECK-REGDEC-NEXT: [[TMP4]] = call i32 @llvm.loop.decrement.reg.i32(i32 [[TMP3]], i32 1)
; CHECK-REGDEC-NEXT: [[TMP5:%.*]] = icmp ne i32 [[TMP4]], 0
; CHECK-REGDEC-NEXT: br i1 [[TMP5]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-REGDEC: while.end:
; CHECK-REGDEC-NEXT: ret void
entry:
%cmp4 = icmp slt i32 %i, %N
br i1 %cmp4, label %while.end, label %while.body
while.body:
%i.addr.05 = phi i32 [ %dec, %while.body ], [ %i, %entry ]
%arrayidx = getelementptr inbounds i32, i32* %A, i32 %i.addr.05
store i32 %i.addr.05, i32* %arrayidx, align 4
%dec = add nsw i32 %i.addr.05, -1
%cmp = icmp sgt i32 %i.addr.05, %N
br i1 %cmp, label %while.body, label %while.end
while.end:
ret void
}
define void @while_ne(i32 %N, i32* nocapture %A) {
; CHECK-DEC-LABEL: @while_ne(
; CHECK-DEC-NEXT: entry:
; CHECK-DEC-NEXT: [[CMP:%.*]] = icmp ne i32 [[N:%.*]], 0
; CHECK-DEC-NEXT: br i1 [[CMP]], label [[WHILE_BODY_PREHEADER:%.*]], label [[WHILE_END:%.*]]
; CHECK-DEC: while.body.preheader:
; CHECK-DEC-NEXT: call void @llvm.set.loop.iterations.i32(i32 [[N]])
; CHECK-DEC-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-DEC: while.body:
; CHECK-DEC-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[INC:%.*]], [[WHILE_BODY]] ], [ 0, [[WHILE_BODY_PREHEADER]] ]
; CHECK-DEC-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-DEC-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-DEC-NEXT: [[INC]] = add nuw i32 [[I_ADDR_05]], 1
; CHECK-DEC-NEXT: [[TMP0:%.*]] = call i1 @llvm.loop.decrement.i32(i32 1)
; CHECK-DEC-NEXT: br i1 [[TMP0]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-DEC: while.end:
; CHECK-DEC-NEXT: ret void
;
; CHECK-PHI-LABEL: @while_ne(
; CHECK-PHI-NEXT: entry:
; CHECK-PHI-NEXT: [[CMP:%.*]] = icmp ne i32 [[N:%.*]], 0
; CHECK-PHI-NEXT: br i1 [[CMP]], label [[WHILE_BODY_PREHEADER:%.*]], label [[WHILE_END:%.*]]
; CHECK-PHI: while.body.preheader:
; CHECK-PHI-NEXT: [[TMP0:%.*]] = call i32 @llvm.start.loop.iterations.i32(i32 [[N]])
; CHECK-PHI-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-PHI: while.body:
; CHECK-PHI-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[INC:%.*]], [[WHILE_BODY]] ], [ 0, [[WHILE_BODY_PREHEADER]] ]
; CHECK-PHI-NEXT: [[TMP1:%.*]] = phi i32 [ [[TMP0]], [[WHILE_BODY_PREHEADER]] ], [ [[TMP2:%.*]], [[WHILE_BODY]] ]
; CHECK-PHI-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-PHI-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-PHI-NEXT: [[INC]] = add nuw i32 [[I_ADDR_05]], 1
; CHECK-PHI-NEXT: [[TMP2]] = call i32 @llvm.loop.decrement.reg.i32(i32 [[TMP1]], i32 1)
; CHECK-PHI-NEXT: [[TMP3:%.*]] = icmp ne i32 [[TMP2]], 0
; CHECK-PHI-NEXT: br i1 [[TMP3]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-PHI: while.end:
; CHECK-PHI-NEXT: ret void
;
; CHECK-NESTED-LABEL: @while_ne(
; CHECK-NESTED-NEXT: entry:
; CHECK-NESTED-NEXT: [[CMP:%.*]] = icmp ne i32 [[N:%.*]], 0
; CHECK-NESTED-NEXT: br i1 [[CMP]], label [[WHILE_BODY_PREHEADER:%.*]], label [[WHILE_END:%.*]]
; CHECK-NESTED: while.body.preheader:
; CHECK-NESTED-NEXT: call void @llvm.set.loop.iterations.i32(i32 [[N]])
; CHECK-NESTED-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-NESTED: while.body:
; CHECK-NESTED-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[INC:%.*]], [[WHILE_BODY]] ], [ 0, [[WHILE_BODY_PREHEADER]] ]
; CHECK-NESTED-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-NESTED-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-NESTED-NEXT: [[INC]] = add nuw i32 [[I_ADDR_05]], 1
; CHECK-NESTED-NEXT: [[TMP0:%.*]] = call i1 @llvm.loop.decrement.i32(i32 1)
; CHECK-NESTED-NEXT: br i1 [[TMP0]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-NESTED: while.end:
; CHECK-NESTED-NEXT: ret void
;
; CHECK-GUARD-LABEL: @while_ne(
; CHECK-GUARD-NEXT: entry:
; CHECK-GUARD-NEXT: [[CMP:%.*]] = icmp ne i32 [[N:%.*]], 0
; CHECK-GUARD-NEXT: [[TMP0:%.*]] = call i1 @llvm.test.set.loop.iterations.i32(i32 [[N]])
; CHECK-GUARD-NEXT: br i1 [[TMP0]], label [[WHILE_BODY_PREHEADER:%.*]], label [[WHILE_END:%.*]]
; CHECK-GUARD: while.body.preheader:
; CHECK-GUARD-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-GUARD: while.body:
; CHECK-GUARD-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[INC:%.*]], [[WHILE_BODY]] ], [ 0, [[WHILE_BODY_PREHEADER]] ]
; CHECK-GUARD-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-GUARD-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-GUARD-NEXT: [[INC]] = add nuw i32 [[I_ADDR_05]], 1
; CHECK-GUARD-NEXT: [[TMP1:%.*]] = call i1 @llvm.loop.decrement.i32(i32 1)
; CHECK-GUARD-NEXT: br i1 [[TMP1]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-GUARD: while.end:
; CHECK-GUARD-NEXT: ret void
;
; CHECK-PHIGUARD-LABEL: @while_ne(
; CHECK-PHIGUARD-NEXT: entry:
; CHECK-PHIGUARD-NEXT: [[CMP:%.*]] = icmp ne i32 [[N:%.*]], 0
; CHECK-PHIGUARD-NEXT: [[TMP0:%.*]] = call i1 @llvm.test.set.loop.iterations.i32(i32 [[N]])
; CHECK-PHIGUARD-NEXT: br i1 [[TMP0]], label [[WHILE_BODY_PREHEADER:%.*]], label [[WHILE_END:%.*]]
; CHECK-PHIGUARD: while.body.preheader:
; CHECK-PHIGUARD-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-PHIGUARD: while.body:
; CHECK-PHIGUARD-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[INC:%.*]], [[WHILE_BODY]] ], [ 0, [[WHILE_BODY_PREHEADER]] ]
; CHECK-PHIGUARD-NEXT: [[TMP1:%.*]] = phi i32 [ [[N]], [[WHILE_BODY_PREHEADER]] ], [ [[TMP2:%.*]], [[WHILE_BODY]] ]
; CHECK-PHIGUARD-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-PHIGUARD-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-PHIGUARD-NEXT: [[INC]] = add nuw i32 [[I_ADDR_05]], 1
; CHECK-PHIGUARD-NEXT: [[TMP2]] = call i32 @llvm.loop.decrement.reg.i32(i32 [[TMP1]], i32 1)
; CHECK-PHIGUARD-NEXT: [[TMP3:%.*]] = icmp ne i32 [[TMP2]], 0
; CHECK-PHIGUARD-NEXT: br i1 [[TMP3]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-PHIGUARD: while.end:
; CHECK-PHIGUARD-NEXT: ret void
;
; CHECK-REGDEC-LABEL: @while_ne(
; CHECK-REGDEC-NEXT: entry:
; CHECK-REGDEC-NEXT: [[CMP:%.*]] = icmp ne i32 [[N:%.*]], 0
; CHECK-REGDEC-NEXT: br i1 [[CMP]], label [[WHILE_BODY_PREHEADER:%.*]], label [[WHILE_END:%.*]]
; CHECK-REGDEC: while.body.preheader:
; CHECK-REGDEC-NEXT: [[TMP0:%.*]] = call i32 @llvm.start.loop.iterations.i32(i32 [[N]])
; CHECK-REGDEC-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-REGDEC: while.body:
; CHECK-REGDEC-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[INC:%.*]], [[WHILE_BODY]] ], [ 0, [[WHILE_BODY_PREHEADER]] ]
; CHECK-REGDEC-NEXT: [[TMP1:%.*]] = phi i32 [ [[TMP0]], [[WHILE_BODY_PREHEADER]] ], [ [[TMP2:%.*]], [[WHILE_BODY]] ]
; CHECK-REGDEC-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-REGDEC-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-REGDEC-NEXT: [[INC]] = add nuw i32 [[I_ADDR_05]], 1
; CHECK-REGDEC-NEXT: [[TMP2]] = call i32 @llvm.loop.decrement.reg.i32(i32 [[TMP1]], i32 1)
; CHECK-REGDEC-NEXT: [[TMP3:%.*]] = icmp ne i32 [[TMP2]], 0
; CHECK-REGDEC-NEXT: br i1 [[TMP3]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-REGDEC: while.end:
; CHECK-REGDEC-NEXT: ret void
entry:
%cmp = icmp ne i32 %N, 0
br i1 %cmp, label %while.body, label %while.end
while.body:
%i.addr.05 = phi i32 [ %inc, %while.body ], [ 0, %entry ]
%arrayidx = getelementptr inbounds i32, i32* %A, i32 %i.addr.05
store i32 %i.addr.05, i32* %arrayidx, align 4
%inc = add nuw i32 %i.addr.05, 1
%exitcond = icmp eq i32 %inc, %N
br i1 %exitcond, label %while.end, label %while.body
while.end:
ret void
}
define void @while_eq(i32 %N, i32* nocapture %A) {
; CHECK-DEC-LABEL: @while_eq(
; CHECK-DEC-NEXT: entry:
; CHECK-DEC-NEXT: [[CMP:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-DEC-NEXT: br i1 [[CMP]], label [[WHILE_END:%.*]], label [[WHILE_BODY_PREHEADER:%.*]]
; CHECK-DEC: while.body.preheader:
; CHECK-DEC-NEXT: call void @llvm.set.loop.iterations.i32(i32 [[N]])
; CHECK-DEC-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-DEC: while.body:
; CHECK-DEC-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[INC:%.*]], [[WHILE_BODY]] ], [ 0, [[WHILE_BODY_PREHEADER]] ]
; CHECK-DEC-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-DEC-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-DEC-NEXT: [[INC]] = add nuw i32 [[I_ADDR_05]], 1
; CHECK-DEC-NEXT: [[TMP0:%.*]] = call i1 @llvm.loop.decrement.i32(i32 1)
; CHECK-DEC-NEXT: br i1 [[TMP0]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-DEC: while.end:
; CHECK-DEC-NEXT: ret void
;
; CHECK-PHI-LABEL: @while_eq(
; CHECK-PHI-NEXT: entry:
; CHECK-PHI-NEXT: [[CMP:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-PHI-NEXT: br i1 [[CMP]], label [[WHILE_END:%.*]], label [[WHILE_BODY_PREHEADER:%.*]]
; CHECK-PHI: while.body.preheader:
; CHECK-PHI-NEXT: [[TMP0:%.*]] = call i32 @llvm.start.loop.iterations.i32(i32 [[N]])
; CHECK-PHI-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-PHI: while.body:
; CHECK-PHI-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[INC:%.*]], [[WHILE_BODY]] ], [ 0, [[WHILE_BODY_PREHEADER]] ]
; CHECK-PHI-NEXT: [[TMP1:%.*]] = phi i32 [ [[TMP0]], [[WHILE_BODY_PREHEADER]] ], [ [[TMP2:%.*]], [[WHILE_BODY]] ]
; CHECK-PHI-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-PHI-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-PHI-NEXT: [[INC]] = add nuw i32 [[I_ADDR_05]], 1
; CHECK-PHI-NEXT: [[TMP2]] = call i32 @llvm.loop.decrement.reg.i32(i32 [[TMP1]], i32 1)
; CHECK-PHI-NEXT: [[TMP3:%.*]] = icmp ne i32 [[TMP2]], 0
; CHECK-PHI-NEXT: br i1 [[TMP3]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-PHI: while.end:
; CHECK-PHI-NEXT: ret void
;
; CHECK-NESTED-LABEL: @while_eq(
; CHECK-NESTED-NEXT: entry:
; CHECK-NESTED-NEXT: [[CMP:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-NESTED-NEXT: br i1 [[CMP]], label [[WHILE_END:%.*]], label [[WHILE_BODY_PREHEADER:%.*]]
; CHECK-NESTED: while.body.preheader:
; CHECK-NESTED-NEXT: call void @llvm.set.loop.iterations.i32(i32 [[N]])
; CHECK-NESTED-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-NESTED: while.body:
; CHECK-NESTED-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[INC:%.*]], [[WHILE_BODY]] ], [ 0, [[WHILE_BODY_PREHEADER]] ]
; CHECK-NESTED-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-NESTED-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-NESTED-NEXT: [[INC]] = add nuw i32 [[I_ADDR_05]], 1
; CHECK-NESTED-NEXT: [[TMP0:%.*]] = call i1 @llvm.loop.decrement.i32(i32 1)
; CHECK-NESTED-NEXT: br i1 [[TMP0]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-NESTED: while.end:
; CHECK-NESTED-NEXT: ret void
;
; CHECK-GUARD-LABEL: @while_eq(
; CHECK-GUARD-NEXT: entry:
; CHECK-GUARD-NEXT: [[CMP:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-GUARD-NEXT: [[TMP0:%.*]] = call i1 @llvm.test.set.loop.iterations.i32(i32 [[N]])
; CHECK-GUARD-NEXT: br i1 [[TMP0]], label [[WHILE_BODY_PREHEADER:%.*]], label [[WHILE_END:%.*]]
; CHECK-GUARD: while.body.preheader:
; CHECK-GUARD-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-GUARD: while.body:
; CHECK-GUARD-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[INC:%.*]], [[WHILE_BODY]] ], [ 0, [[WHILE_BODY_PREHEADER]] ]
; CHECK-GUARD-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-GUARD-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-GUARD-NEXT: [[INC]] = add nuw i32 [[I_ADDR_05]], 1
; CHECK-GUARD-NEXT: [[TMP1:%.*]] = call i1 @llvm.loop.decrement.i32(i32 1)
; CHECK-GUARD-NEXT: br i1 [[TMP1]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-GUARD: while.end:
; CHECK-GUARD-NEXT: ret void
;
; CHECK-PHIGUARD-LABEL: @while_eq(
; CHECK-PHIGUARD-NEXT: entry:
; CHECK-PHIGUARD-NEXT: [[CMP:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-PHIGUARD-NEXT: [[TMP0:%.*]] = call i1 @llvm.test.set.loop.iterations.i32(i32 [[N]])
; CHECK-PHIGUARD-NEXT: br i1 [[TMP0]], label [[WHILE_BODY_PREHEADER:%.*]], label [[WHILE_END:%.*]]
; CHECK-PHIGUARD: while.body.preheader:
; CHECK-PHIGUARD-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-PHIGUARD: while.body:
; CHECK-PHIGUARD-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[INC:%.*]], [[WHILE_BODY]] ], [ 0, [[WHILE_BODY_PREHEADER]] ]
; CHECK-PHIGUARD-NEXT: [[TMP1:%.*]] = phi i32 [ [[N]], [[WHILE_BODY_PREHEADER]] ], [ [[TMP2:%.*]], [[WHILE_BODY]] ]
; CHECK-PHIGUARD-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-PHIGUARD-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-PHIGUARD-NEXT: [[INC]] = add nuw i32 [[I_ADDR_05]], 1
; CHECK-PHIGUARD-NEXT: [[TMP2]] = call i32 @llvm.loop.decrement.reg.i32(i32 [[TMP1]], i32 1)
; CHECK-PHIGUARD-NEXT: [[TMP3:%.*]] = icmp ne i32 [[TMP2]], 0
; CHECK-PHIGUARD-NEXT: br i1 [[TMP3]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-PHIGUARD: while.end:
; CHECK-PHIGUARD-NEXT: ret void
;
; CHECK-REGDEC-LABEL: @while_eq(
; CHECK-REGDEC-NEXT: entry:
; CHECK-REGDEC-NEXT: [[CMP:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-REGDEC-NEXT: br i1 [[CMP]], label [[WHILE_END:%.*]], label [[WHILE_BODY_PREHEADER:%.*]]
; CHECK-REGDEC: while.body.preheader:
; CHECK-REGDEC-NEXT: [[TMP0:%.*]] = call i32 @llvm.start.loop.iterations.i32(i32 [[N]])
; CHECK-REGDEC-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-REGDEC: while.body:
; CHECK-REGDEC-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[INC:%.*]], [[WHILE_BODY]] ], [ 0, [[WHILE_BODY_PREHEADER]] ]
; CHECK-REGDEC-NEXT: [[TMP1:%.*]] = phi i32 [ [[TMP0]], [[WHILE_BODY_PREHEADER]] ], [ [[TMP2:%.*]], [[WHILE_BODY]] ]
; CHECK-REGDEC-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-REGDEC-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-REGDEC-NEXT: [[INC]] = add nuw i32 [[I_ADDR_05]], 1
; CHECK-REGDEC-NEXT: [[TMP2]] = call i32 @llvm.loop.decrement.reg.i32(i32 [[TMP1]], i32 1)
; CHECK-REGDEC-NEXT: [[TMP3:%.*]] = icmp ne i32 [[TMP2]], 0
; CHECK-REGDEC-NEXT: br i1 [[TMP3]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-REGDEC: while.end:
; CHECK-REGDEC-NEXT: ret void
entry:
%cmp = icmp eq i32 %N, 0
br i1 %cmp, label %while.end, label %while.body
while.body:
%i.addr.05 = phi i32 [ %inc, %while.body ], [ 0, %entry ]
%arrayidx = getelementptr inbounds i32, i32* %A, i32 %i.addr.05
store i32 %i.addr.05, i32* %arrayidx, align 4
%inc = add nuw i32 %i.addr.05, 1
%exitcond = icmp eq i32 %inc, %N
br i1 %exitcond, label %while.end, label %while.body
while.end:
ret void
}
define void @while_preheader_eq(i32 %N, i32* nocapture %A) {
; CHECK-DEC-LABEL: @while_preheader_eq(
; CHECK-DEC-NEXT: entry:
; CHECK-DEC-NEXT: br label [[PREHEADER:%.*]]
; CHECK-DEC: preheader:
; CHECK-DEC-NEXT: [[CMP:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-DEC-NEXT: br i1 [[CMP]], label [[WHILE_END:%.*]], label [[WHILE_BODY_PREHEADER:%.*]]
; CHECK-DEC: while.body.preheader:
; CHECK-DEC-NEXT: call void @llvm.set.loop.iterations.i32(i32 [[N]])
; CHECK-DEC-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-DEC: while.body:
; CHECK-DEC-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[INC:%.*]], [[WHILE_BODY]] ], [ 0, [[WHILE_BODY_PREHEADER]] ]
; CHECK-DEC-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-DEC-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-DEC-NEXT: [[INC]] = add nuw i32 [[I_ADDR_05]], 1
; CHECK-DEC-NEXT: [[TMP0:%.*]] = call i1 @llvm.loop.decrement.i32(i32 1)
; CHECK-DEC-NEXT: br i1 [[TMP0]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-DEC: while.end:
; CHECK-DEC-NEXT: ret void
;
; CHECK-PHI-LABEL: @while_preheader_eq(
; CHECK-PHI-NEXT: entry:
; CHECK-PHI-NEXT: br label [[PREHEADER:%.*]]
; CHECK-PHI: preheader:
; CHECK-PHI-NEXT: [[CMP:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-PHI-NEXT: br i1 [[CMP]], label [[WHILE_END:%.*]], label [[WHILE_BODY_PREHEADER:%.*]]
; CHECK-PHI: while.body.preheader:
; CHECK-PHI-NEXT: [[TMP0:%.*]] = call i32 @llvm.start.loop.iterations.i32(i32 [[N]])
; CHECK-PHI-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-PHI: while.body:
; CHECK-PHI-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[INC:%.*]], [[WHILE_BODY]] ], [ 0, [[WHILE_BODY_PREHEADER]] ]
; CHECK-PHI-NEXT: [[TMP1:%.*]] = phi i32 [ [[TMP0]], [[WHILE_BODY_PREHEADER]] ], [ [[TMP2:%.*]], [[WHILE_BODY]] ]
; CHECK-PHI-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-PHI-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-PHI-NEXT: [[INC]] = add nuw i32 [[I_ADDR_05]], 1
; CHECK-PHI-NEXT: [[TMP2]] = call i32 @llvm.loop.decrement.reg.i32(i32 [[TMP1]], i32 1)
; CHECK-PHI-NEXT: [[TMP3:%.*]] = icmp ne i32 [[TMP2]], 0
; CHECK-PHI-NEXT: br i1 [[TMP3]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-PHI: while.end:
; CHECK-PHI-NEXT: ret void
;
; CHECK-NESTED-LABEL: @while_preheader_eq(
; CHECK-NESTED-NEXT: entry:
; CHECK-NESTED-NEXT: br label [[PREHEADER:%.*]]
; CHECK-NESTED: preheader:
; CHECK-NESTED-NEXT: [[CMP:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-NESTED-NEXT: br i1 [[CMP]], label [[WHILE_END:%.*]], label [[WHILE_BODY_PREHEADER:%.*]]
; CHECK-NESTED: while.body.preheader:
; CHECK-NESTED-NEXT: call void @llvm.set.loop.iterations.i32(i32 [[N]])
; CHECK-NESTED-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-NESTED: while.body:
; CHECK-NESTED-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[INC:%.*]], [[WHILE_BODY]] ], [ 0, [[WHILE_BODY_PREHEADER]] ]
; CHECK-NESTED-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-NESTED-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-NESTED-NEXT: [[INC]] = add nuw i32 [[I_ADDR_05]], 1
; CHECK-NESTED-NEXT: [[TMP0:%.*]] = call i1 @llvm.loop.decrement.i32(i32 1)
; CHECK-NESTED-NEXT: br i1 [[TMP0]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-NESTED: while.end:
; CHECK-NESTED-NEXT: ret void
;
; CHECK-GUARD-LABEL: @while_preheader_eq(
; CHECK-GUARD-NEXT: entry:
; CHECK-GUARD-NEXT: br label [[PREHEADER:%.*]]
; CHECK-GUARD: preheader:
; CHECK-GUARD-NEXT: [[CMP:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-GUARD-NEXT: [[TMP0:%.*]] = call i1 @llvm.test.set.loop.iterations.i32(i32 [[N]])
; CHECK-GUARD-NEXT: br i1 [[TMP0]], label [[WHILE_BODY_PREHEADER:%.*]], label [[WHILE_END:%.*]]
; CHECK-GUARD: while.body.preheader:
; CHECK-GUARD-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-GUARD: while.body:
; CHECK-GUARD-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[INC:%.*]], [[WHILE_BODY]] ], [ 0, [[WHILE_BODY_PREHEADER]] ]
; CHECK-GUARD-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-GUARD-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-GUARD-NEXT: [[INC]] = add nuw i32 [[I_ADDR_05]], 1
; CHECK-GUARD-NEXT: [[TMP1:%.*]] = call i1 @llvm.loop.decrement.i32(i32 1)
; CHECK-GUARD-NEXT: br i1 [[TMP1]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-GUARD: while.end:
; CHECK-GUARD-NEXT: ret void
;
; CHECK-PHIGUARD-LABEL: @while_preheader_eq(
; CHECK-PHIGUARD-NEXT: entry:
; CHECK-PHIGUARD-NEXT: br label [[PREHEADER:%.*]]
; CHECK-PHIGUARD: preheader:
; CHECK-PHIGUARD-NEXT: [[CMP:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-PHIGUARD-NEXT: [[TMP0:%.*]] = call i1 @llvm.test.set.loop.iterations.i32(i32 [[N]])
; CHECK-PHIGUARD-NEXT: br i1 [[TMP0]], label [[WHILE_BODY_PREHEADER:%.*]], label [[WHILE_END:%.*]]
; CHECK-PHIGUARD: while.body.preheader:
; CHECK-PHIGUARD-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-PHIGUARD: while.body:
; CHECK-PHIGUARD-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[INC:%.*]], [[WHILE_BODY]] ], [ 0, [[WHILE_BODY_PREHEADER]] ]
; CHECK-PHIGUARD-NEXT: [[TMP1:%.*]] = phi i32 [ [[N]], [[WHILE_BODY_PREHEADER]] ], [ [[TMP2:%.*]], [[WHILE_BODY]] ]
; CHECK-PHIGUARD-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-PHIGUARD-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-PHIGUARD-NEXT: [[INC]] = add nuw i32 [[I_ADDR_05]], 1
; CHECK-PHIGUARD-NEXT: [[TMP2]] = call i32 @llvm.loop.decrement.reg.i32(i32 [[TMP1]], i32 1)
; CHECK-PHIGUARD-NEXT: [[TMP3:%.*]] = icmp ne i32 [[TMP2]], 0
; CHECK-PHIGUARD-NEXT: br i1 [[TMP3]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-PHIGUARD: while.end:
; CHECK-PHIGUARD-NEXT: ret void
;
; CHECK-REGDEC-LABEL: @while_preheader_eq(
; CHECK-REGDEC-NEXT: entry:
; CHECK-REGDEC-NEXT: br label [[PREHEADER:%.*]]
; CHECK-REGDEC: preheader:
; CHECK-REGDEC-NEXT: [[CMP:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-REGDEC-NEXT: br i1 [[CMP]], label [[WHILE_END:%.*]], label [[WHILE_BODY_PREHEADER:%.*]]
; CHECK-REGDEC: while.body.preheader:
; CHECK-REGDEC-NEXT: [[TMP0:%.*]] = call i32 @llvm.start.loop.iterations.i32(i32 [[N]])
; CHECK-REGDEC-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK-REGDEC: while.body:
; CHECK-REGDEC-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[INC:%.*]], [[WHILE_BODY]] ], [ 0, [[WHILE_BODY_PREHEADER]] ]
; CHECK-REGDEC-NEXT: [[TMP1:%.*]] = phi i32 [ [[TMP0]], [[WHILE_BODY_PREHEADER]] ], [ [[TMP2:%.*]], [[WHILE_BODY]] ]
; CHECK-REGDEC-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-REGDEC-NEXT: store i32 [[I_ADDR_05]], i32* [[ARRAYIDX]], align 4
; CHECK-REGDEC-NEXT: [[INC]] = add nuw i32 [[I_ADDR_05]], 1
; CHECK-REGDEC-NEXT: [[TMP2]] = call i32 @llvm.loop.decrement.reg.i32(i32 [[TMP1]], i32 1)
; CHECK-REGDEC-NEXT: [[TMP3:%.*]] = icmp ne i32 [[TMP2]], 0
; CHECK-REGDEC-NEXT: br i1 [[TMP3]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK-REGDEC: while.end:
; CHECK-REGDEC-NEXT: ret void
entry:
br label %preheader
preheader:
%cmp = icmp eq i32 %N, 0
br i1 %cmp, label %while.end, label %while.body
while.body:
%i.addr.05 = phi i32 [ %inc, %while.body ], [ 0, %preheader ]
%arrayidx = getelementptr inbounds i32, i32* %A, i32 %i.addr.05
store i32 %i.addr.05, i32* %arrayidx, align 4
%inc = add nuw i32 %i.addr.05, 1
%exitcond = icmp eq i32 %inc, %N
br i1 %exitcond, label %while.end, label %while.body
while.end:
ret void
}
define void @nested(i32* nocapture %A, i32 %N) {
; CHECK-DEC-LABEL: @nested(
; CHECK-DEC-NEXT: entry:
; CHECK-DEC-NEXT: [[CMP20:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-DEC-NEXT: br i1 [[CMP20]], label [[WHILE_END7:%.*]], label [[WHILE_COND1_PREHEADER_US:%.*]]
; CHECK-DEC: while.cond1.preheader.us:
; CHECK-DEC-NEXT: [[I_021_US:%.*]] = phi i32 [ [[INC6_US:%.*]], [[WHILE_COND1_WHILE_END_CRIT_EDGE_US:%.*]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-DEC-NEXT: [[MUL_US:%.*]] = mul i32 [[I_021_US]], [[N]]
; CHECK-DEC-NEXT: call void @llvm.set.loop.iterations.i32(i32 [[N]])
; CHECK-DEC-NEXT: br label [[WHILE_BODY3_US:%.*]]
; CHECK-DEC: while.body3.us:
; CHECK-DEC-NEXT: [[J_019_US:%.*]] = phi i32 [ 0, [[WHILE_COND1_PREHEADER_US]] ], [ [[INC_US:%.*]], [[WHILE_BODY3_US]] ]
; CHECK-DEC-NEXT: [[ADD_US:%.*]] = add i32 [[J_019_US]], [[MUL_US]]
; CHECK-DEC-NEXT: [[ARRAYIDX_US:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[ADD_US]]
; CHECK-DEC-NEXT: store i32 [[ADD_US]], i32* [[ARRAYIDX_US]], align 4
; CHECK-DEC-NEXT: [[INC_US]] = add nuw i32 [[J_019_US]], 1
; CHECK-DEC-NEXT: [[TMP0:%.*]] = call i1 @llvm.loop.decrement.i32(i32 1)
; CHECK-DEC-NEXT: br i1 [[TMP0]], label [[WHILE_BODY3_US]], label [[WHILE_COND1_WHILE_END_CRIT_EDGE_US]]
; CHECK-DEC: while.cond1.while.end_crit_edge.us:
; CHECK-DEC-NEXT: [[INC6_US]] = add nuw i32 [[I_021_US]], 1
; CHECK-DEC-NEXT: [[EXITCOND23:%.*]] = icmp eq i32 [[INC6_US]], [[N]]
; CHECK-DEC-NEXT: br i1 [[EXITCOND23]], label [[WHILE_END7]], label [[WHILE_COND1_PREHEADER_US]]
; CHECK-DEC: while.end7:
; CHECK-DEC-NEXT: ret void
;
; CHECK-PHI-LABEL: @nested(
; CHECK-PHI-NEXT: entry:
; CHECK-PHI-NEXT: [[CMP20:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-PHI-NEXT: br i1 [[CMP20]], label [[WHILE_END7:%.*]], label [[WHILE_COND1_PREHEADER_US:%.*]]
; CHECK-PHI: while.cond1.preheader.us:
; CHECK-PHI-NEXT: [[I_021_US:%.*]] = phi i32 [ [[INC6_US:%.*]], [[WHILE_COND1_WHILE_END_CRIT_EDGE_US:%.*]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-PHI-NEXT: [[MUL_US:%.*]] = mul i32 [[I_021_US]], [[N]]
; CHECK-PHI-NEXT: [[TMP0:%.*]] = call i32 @llvm.start.loop.iterations.i32(i32 [[N]])
; CHECK-PHI-NEXT: br label [[WHILE_BODY3_US:%.*]]
; CHECK-PHI: while.body3.us:
; CHECK-PHI-NEXT: [[J_019_US:%.*]] = phi i32 [ 0, [[WHILE_COND1_PREHEADER_US]] ], [ [[INC_US:%.*]], [[WHILE_BODY3_US]] ]
; CHECK-PHI-NEXT: [[TMP1:%.*]] = phi i32 [ [[TMP0]], [[WHILE_COND1_PREHEADER_US]] ], [ [[TMP2:%.*]], [[WHILE_BODY3_US]] ]
; CHECK-PHI-NEXT: [[ADD_US:%.*]] = add i32 [[J_019_US]], [[MUL_US]]
; CHECK-PHI-NEXT: [[ARRAYIDX_US:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[ADD_US]]
; CHECK-PHI-NEXT: store i32 [[ADD_US]], i32* [[ARRAYIDX_US]], align 4
; CHECK-PHI-NEXT: [[INC_US]] = add nuw i32 [[J_019_US]], 1
; CHECK-PHI-NEXT: [[TMP2]] = call i32 @llvm.loop.decrement.reg.i32(i32 [[TMP1]], i32 1)
; CHECK-PHI-NEXT: [[TMP3:%.*]] = icmp ne i32 [[TMP2]], 0
; CHECK-PHI-NEXT: br i1 [[TMP3]], label [[WHILE_BODY3_US]], label [[WHILE_COND1_WHILE_END_CRIT_EDGE_US]]
; CHECK-PHI: while.cond1.while.end_crit_edge.us:
; CHECK-PHI-NEXT: [[INC6_US]] = add nuw i32 [[I_021_US]], 1
; CHECK-PHI-NEXT: [[EXITCOND23:%.*]] = icmp eq i32 [[INC6_US]], [[N]]
; CHECK-PHI-NEXT: br i1 [[EXITCOND23]], label [[WHILE_END7]], label [[WHILE_COND1_PREHEADER_US]]
; CHECK-PHI: while.end7:
; CHECK-PHI-NEXT: ret void
;
; CHECK-NESTED-LABEL: @nested(
; CHECK-NESTED-NEXT: entry:
; CHECK-NESTED-NEXT: [[CMP20:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-NESTED-NEXT: br i1 [[CMP20]], label [[WHILE_END7:%.*]], label [[WHILE_COND1_PREHEADER_US_PREHEADER:%.*]]
; CHECK-NESTED: while.cond1.preheader.us.preheader:
; CHECK-NESTED-NEXT: call void @llvm.set.loop.iterations.i32(i32 [[N]])
; CHECK-NESTED-NEXT: br label [[WHILE_COND1_PREHEADER_US:%.*]]
; CHECK-NESTED: while.cond1.preheader.us:
; CHECK-NESTED-NEXT: [[I_021_US:%.*]] = phi i32 [ [[INC6_US:%.*]], [[WHILE_COND1_WHILE_END_CRIT_EDGE_US:%.*]] ], [ 0, [[WHILE_COND1_PREHEADER_US_PREHEADER]] ]
; CHECK-NESTED-NEXT: [[MUL_US:%.*]] = mul i32 [[I_021_US]], [[N]]
; CHECK-NESTED-NEXT: call void @llvm.set.loop.iterations.i32(i32 [[N]])
; CHECK-NESTED-NEXT: br label [[WHILE_BODY3_US:%.*]]
; CHECK-NESTED: while.body3.us:
; CHECK-NESTED-NEXT: [[J_019_US:%.*]] = phi i32 [ 0, [[WHILE_COND1_PREHEADER_US]] ], [ [[INC_US:%.*]], [[WHILE_BODY3_US]] ]
; CHECK-NESTED-NEXT: [[ADD_US:%.*]] = add i32 [[J_019_US]], [[MUL_US]]
; CHECK-NESTED-NEXT: [[ARRAYIDX_US:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[ADD_US]]
; CHECK-NESTED-NEXT: store i32 [[ADD_US]], i32* [[ARRAYIDX_US]], align 4
; CHECK-NESTED-NEXT: [[INC_US]] = add nuw i32 [[J_019_US]], 1
; CHECK-NESTED-NEXT: [[TMP0:%.*]] = call i1 @llvm.loop.decrement.i32(i32 1)
; CHECK-NESTED-NEXT: br i1 [[TMP0]], label [[WHILE_BODY3_US]], label [[WHILE_COND1_WHILE_END_CRIT_EDGE_US]]
; CHECK-NESTED: while.cond1.while.end_crit_edge.us:
; CHECK-NESTED-NEXT: [[INC6_US]] = add nuw i32 [[I_021_US]], 1
; CHECK-NESTED-NEXT: [[TMP1:%.*]] = call i1 @llvm.loop.decrement.i32(i32 1)
; CHECK-NESTED-NEXT: br i1 [[TMP1]], label [[WHILE_COND1_PREHEADER_US]], label [[WHILE_END7]]
; CHECK-NESTED: while.end7:
; CHECK-NESTED-NEXT: ret void
;
; CHECK-GUARD-LABEL: @nested(
; CHECK-GUARD-NEXT: entry:
; CHECK-GUARD-NEXT: [[CMP20:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-GUARD-NEXT: br i1 [[CMP20]], label [[WHILE_END7:%.*]], label [[WHILE_COND1_PREHEADER_US:%.*]]
; CHECK-GUARD: while.cond1.preheader.us:
; CHECK-GUARD-NEXT: [[I_021_US:%.*]] = phi i32 [ [[INC6_US:%.*]], [[WHILE_COND1_WHILE_END_CRIT_EDGE_US:%.*]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-GUARD-NEXT: [[MUL_US:%.*]] = mul i32 [[I_021_US]], [[N]]
; CHECK-GUARD-NEXT: call void @llvm.set.loop.iterations.i32(i32 [[N]])
; CHECK-GUARD-NEXT: br label [[WHILE_BODY3_US:%.*]]
; CHECK-GUARD: while.body3.us:
; CHECK-GUARD-NEXT: [[J_019_US:%.*]] = phi i32 [ 0, [[WHILE_COND1_PREHEADER_US]] ], [ [[INC_US:%.*]], [[WHILE_BODY3_US]] ]
; CHECK-GUARD-NEXT: [[ADD_US:%.*]] = add i32 [[J_019_US]], [[MUL_US]]
; CHECK-GUARD-NEXT: [[ARRAYIDX_US:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[ADD_US]]
; CHECK-GUARD-NEXT: store i32 [[ADD_US]], i32* [[ARRAYIDX_US]], align 4
; CHECK-GUARD-NEXT: [[INC_US]] = add nuw i32 [[J_019_US]], 1
; CHECK-GUARD-NEXT: [[TMP0:%.*]] = call i1 @llvm.loop.decrement.i32(i32 1)
; CHECK-GUARD-NEXT: br i1 [[TMP0]], label [[WHILE_BODY3_US]], label [[WHILE_COND1_WHILE_END_CRIT_EDGE_US]]
; CHECK-GUARD: while.cond1.while.end_crit_edge.us:
; CHECK-GUARD-NEXT: [[INC6_US]] = add nuw i32 [[I_021_US]], 1
; CHECK-GUARD-NEXT: [[EXITCOND23:%.*]] = icmp eq i32 [[INC6_US]], [[N]]
; CHECK-GUARD-NEXT: br i1 [[EXITCOND23]], label [[WHILE_END7]], label [[WHILE_COND1_PREHEADER_US]]
; CHECK-GUARD: while.end7:
; CHECK-GUARD-NEXT: ret void
;
; CHECK-PHIGUARD-LABEL: @nested(
; CHECK-PHIGUARD-NEXT: entry:
; CHECK-PHIGUARD-NEXT: [[CMP20:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-PHIGUARD-NEXT: br i1 [[CMP20]], label [[WHILE_END7:%.*]], label [[WHILE_COND1_PREHEADER_US:%.*]]
; CHECK-PHIGUARD: while.cond1.preheader.us:
; CHECK-PHIGUARD-NEXT: [[I_021_US:%.*]] = phi i32 [ [[INC6_US:%.*]], [[WHILE_COND1_WHILE_END_CRIT_EDGE_US:%.*]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-PHIGUARD-NEXT: [[MUL_US:%.*]] = mul i32 [[I_021_US]], [[N]]
; CHECK-PHIGUARD-NEXT: [[TMP0:%.*]] = call i32 @llvm.start.loop.iterations.i32(i32 [[N]])
; CHECK-PHIGUARD-NEXT: br label [[WHILE_BODY3_US:%.*]]
; CHECK-PHIGUARD: while.body3.us:
; CHECK-PHIGUARD-NEXT: [[J_019_US:%.*]] = phi i32 [ 0, [[WHILE_COND1_PREHEADER_US]] ], [ [[INC_US:%.*]], [[WHILE_BODY3_US]] ]
; CHECK-PHIGUARD-NEXT: [[TMP1:%.*]] = phi i32 [ [[TMP0]], [[WHILE_COND1_PREHEADER_US]] ], [ [[TMP2:%.*]], [[WHILE_BODY3_US]] ]
; CHECK-PHIGUARD-NEXT: [[ADD_US:%.*]] = add i32 [[J_019_US]], [[MUL_US]]
; CHECK-PHIGUARD-NEXT: [[ARRAYIDX_US:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[ADD_US]]
; CHECK-PHIGUARD-NEXT: store i32 [[ADD_US]], i32* [[ARRAYIDX_US]], align 4
; CHECK-PHIGUARD-NEXT: [[INC_US]] = add nuw i32 [[J_019_US]], 1
; CHECK-PHIGUARD-NEXT: [[TMP2]] = call i32 @llvm.loop.decrement.reg.i32(i32 [[TMP1]], i32 1)
; CHECK-PHIGUARD-NEXT: [[TMP3:%.*]] = icmp ne i32 [[TMP2]], 0
; CHECK-PHIGUARD-NEXT: br i1 [[TMP3]], label [[WHILE_BODY3_US]], label [[WHILE_COND1_WHILE_END_CRIT_EDGE_US]]
; CHECK-PHIGUARD: while.cond1.while.end_crit_edge.us:
; CHECK-PHIGUARD-NEXT: [[INC6_US]] = add nuw i32 [[I_021_US]], 1
; CHECK-PHIGUARD-NEXT: [[EXITCOND23:%.*]] = icmp eq i32 [[INC6_US]], [[N]]
; CHECK-PHIGUARD-NEXT: br i1 [[EXITCOND23]], label [[WHILE_END7]], label [[WHILE_COND1_PREHEADER_US]]
; CHECK-PHIGUARD: while.end7:
; CHECK-PHIGUARD-NEXT: ret void
;
; CHECK-REGDEC-LABEL: @nested(
; CHECK-REGDEC-NEXT: entry:
; CHECK-REGDEC-NEXT: [[CMP20:%.*]] = icmp eq i32 [[N:%.*]], 0
; CHECK-REGDEC-NEXT: br i1 [[CMP20]], label [[WHILE_END7:%.*]], label [[WHILE_COND1_PREHEADER_US:%.*]]
; CHECK-REGDEC: while.cond1.preheader.us:
; CHECK-REGDEC-NEXT: [[I_021_US:%.*]] = phi i32 [ [[INC6_US:%.*]], [[WHILE_COND1_WHILE_END_CRIT_EDGE_US:%.*]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-REGDEC-NEXT: [[MUL_US:%.*]] = mul i32 [[I_021_US]], [[N]]
; CHECK-REGDEC-NEXT: [[TMP0:%.*]] = call i32 @llvm.start.loop.iterations.i32(i32 [[N]])
; CHECK-REGDEC-NEXT: br label [[WHILE_BODY3_US:%.*]]
; CHECK-REGDEC: while.body3.us:
; CHECK-REGDEC-NEXT: [[J_019_US:%.*]] = phi i32 [ 0, [[WHILE_COND1_PREHEADER_US]] ], [ [[INC_US:%.*]], [[WHILE_BODY3_US]] ]
; CHECK-REGDEC-NEXT: [[TMP1:%.*]] = phi i32 [ [[TMP0]], [[WHILE_COND1_PREHEADER_US]] ], [ [[TMP2:%.*]], [[WHILE_BODY3_US]] ]
; CHECK-REGDEC-NEXT: [[ADD_US:%.*]] = add i32 [[J_019_US]], [[MUL_US]]
; CHECK-REGDEC-NEXT: [[ARRAYIDX_US:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i32 [[ADD_US]]
; CHECK-REGDEC-NEXT: store i32 [[ADD_US]], i32* [[ARRAYIDX_US]], align 4
; CHECK-REGDEC-NEXT: [[INC_US]] = add nuw i32 [[J_019_US]], 1
; CHECK-REGDEC-NEXT: [[TMP2]] = call i32 @llvm.loop.decrement.reg.i32(i32 [[TMP1]], i32 1)
; CHECK-REGDEC-NEXT: [[TMP3:%.*]] = icmp ne i32 [[TMP2]], 0
; CHECK-REGDEC-NEXT: br i1 [[TMP3]], label [[WHILE_BODY3_US]], label [[WHILE_COND1_WHILE_END_CRIT_EDGE_US]]
; CHECK-REGDEC: while.cond1.while.end_crit_edge.us:
; CHECK-REGDEC-NEXT: [[INC6_US]] = add nuw i32 [[I_021_US]], 1
; CHECK-REGDEC-NEXT: [[EXITCOND23:%.*]] = icmp eq i32 [[INC6_US]], [[N]]
; CHECK-REGDEC-NEXT: br i1 [[EXITCOND23]], label [[WHILE_END7]], label [[WHILE_COND1_PREHEADER_US]]
; CHECK-REGDEC: while.end7:
; CHECK-REGDEC-NEXT: ret void
entry:
%cmp20 = icmp eq i32 %N, 0
br i1 %cmp20, label %while.end7, label %while.cond1.preheader.us
while.cond1.preheader.us:
%i.021.us = phi i32 [ %inc6.us, %while.cond1.while.end_crit_edge.us ], [ 0, %entry ]
%mul.us = mul i32 %i.021.us, %N
br label %while.body3.us
while.body3.us:
%j.019.us = phi i32 [ 0, %while.cond1.preheader.us ], [ %inc.us, %while.body3.us ]
%add.us = add i32 %j.019.us, %mul.us
%arrayidx.us = getelementptr inbounds i32, i32* %A, i32 %add.us
store i32 %add.us, i32* %arrayidx.us, align 4
%inc.us = add nuw i32 %j.019.us, 1
%exitcond = icmp eq i32 %inc.us, %N
br i1 %exitcond, label %while.cond1.while.end_crit_edge.us, label %while.body3.us
while.cond1.while.end_crit_edge.us:
%inc6.us = add nuw i32 %i.021.us, 1
%exitcond23 = icmp eq i32 %inc6.us, %N
br i1 %exitcond23, label %while.end7, label %while.cond1.preheader.us
while.end7:
ret void
}
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