caio/clang-p2996
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
ef2cdfe393d01cd4935c806387ac912b5a2c8ced
clang-p2996/llvm/test/Transforms/IRCE/unsigned_comparisons_ugt.ll
Roman Lebedev b46c085d2b [NFCI] SCEVExpander: emit intrinsics for integral {u,s}{min,max} SCEV expressions 
These intrinsics, not the icmp+select are the canonical form nowadays,
so we might as well directly emit them.

This should not cause any regressions, but if it does,
then then they would needed to be fixed regardless.

Note that this doesn't deal with `SCEVExpander::isHighCostExpansion()`,
but that is a pessimization, not a correctness issue.

Additionally, the non-intrinsic form has issues with undef,
see https://reviews.llvm.org/D88287#2587863
2021-03-06 21:52:46 +03:00

263 lines
9.4 KiB
LLVM
Raw Blame History

; RUN: opt -verify-loop-info -irce-print-changed-loops -irce -S < %s 2>&1 | FileCheck %s
; RUN: opt -verify-loop-info -irce-print-changed-loops -passes='require<branch-prob>,irce' -S < %s 2>&1 | FileCheck %s
; CHECK: irce: in function test_01: constrained Loop at depth 1 containing: %loop<header><exiting>,%in.bounds<latch><exiting>
; CHECK: irce: in function test_02: constrained Loop at depth 1 containing: %loop<header><exiting>,%in.bounds<latch><exiting>
; CHECK: irce: in function test_03: constrained Loop at depth 1 containing: %loop<header><exiting>,%in.bounds<latch><exiting>
; CHECK: irce: in function test_04: constrained Loop at depth 1 containing: %loop<header><exiting>,%in.bounds<latch><exiting>
; CHECK-NOT: irce: in function test_05: constrained Loop at depth 1 containing: %loop<header><exiting>,%in.bounds<latch><exiting>
; CHECK: irce: in function test_06: constrained Loop at depth 1 containing: %loop<header><exiting>,%in.bounds<latch><exiting>
; UGT condition for increasing loop.
define void @test_01(i32* %arr, i32* %a_len_ptr) #0 {
; CHECK: test_01(
; CHECK: entry:
; CHECK-NEXT: %exit.mainloop.at = load i32, i32* %a_len_ptr, align 4, !range !0
; CHECK-NEXT: [[COND:%[^ ]+]] = icmp ult i32 0, %exit.mainloop.at
; CHECK-NEXT: br i1 [[COND]], label %loop.preheader, label %main.pseudo.exit
; CHECK: loop:
; CHECK-NEXT: %idx = phi i32 [ %idx.next, %in.bounds ], [ 0, %loop.preheader ]
; CHECK-NEXT: %idx.next = add nuw nsw i32 %idx, 1
; CHECK-NEXT: %abc = icmp ult i32 %idx, %exit.mainloop.at
; CHECK-NEXT: br i1 true, label %in.bounds, label %out.of.bounds.loopexit1
; CHECK-NOT: loop.preloop:
; CHECK: loop.postloop:
; CHECK-NEXT: %idx.postloop = phi i32 [ %idx.copy, %postloop ], [ %idx.next.postloop, %in.bounds.postloop ]
; CHECK-NEXT: %idx.next.postloop = add nuw nsw i32 %idx.postloop, 1
; CHECK-NEXT: %abc.postloop = icmp ult i32 %idx.postloop, %exit.mainloop.at
; CHECK-NEXT: br i1 %abc.postloop, label %in.bounds.postloop, label %out.of.bounds.loopexit
entry:
%len = load i32, i32* %a_len_ptr, !range !0
br label %loop
loop:
%idx = phi i32 [ 0, %entry ], [ %idx.next, %in.bounds ]
%idx.next = add nsw nuw i32 %idx, 1
%abc = icmp ult i32 %idx, %len
br i1 %abc, label %in.bounds, label %out.of.bounds
in.bounds:
%addr = getelementptr i32, i32* %arr, i32 %idx
store i32 0, i32* %addr
%next = icmp ugt i32 %idx.next, 100
br i1 %next, label %exit, label %loop
out.of.bounds:
ret void
exit:
ret void
}
; UGT condition for decreasing loop.
define void @test_02(i32* %arr, i32* %a_len_ptr) #0 {
; CHECK: test_02(
; CHECK: entry:
; CHECK-NEXT: %len = load i32, i32* %a_len_ptr, align 4, !range !0
; CHECK-NEXT: [[UMIN:%[^ ]+]] = call i32 @llvm.umax.i32(i32 %len, i32 1)
; CHECK-NEXT: %exit.preloop.at = add nsw i32 [[UMIN]], -1
; CHECK-NEXT: [[COND2:%[^ ]+]] = icmp ugt i32 100, %exit.preloop.at
; CHECK-NEXT: br i1 [[COND2]], label %loop.preloop.preheader, label %preloop.pseudo.exit
; CHECK: mainloop:
; CHECK-NEXT: br label %loop
; CHECK: loop:
; CHECK-NEXT: %idx = phi i32 [ %idx.preloop.copy, %mainloop ], [ %idx.next, %in.bounds ]
; CHECK-NEXT: %idx.next = add i32 %idx, -1
; CHECK-NEXT: %abc = icmp ult i32 %idx, %len
; CHECK-NEXT: br i1 true, label %in.bounds, label %out.of.bounds.loopexit1
; CHECK-NOT: loop.postloop:
; CHECK: loop.preloop:
; CHECK-NEXT: %idx.preloop = phi i32 [ %idx.next.preloop, %in.bounds.preloop ], [ 100, %loop.preloop.preheader ]
; CHECK-NEXT: %idx.next.preloop = add i32 %idx.preloop, -1
; CHECK-NEXT: %abc.preloop = icmp ult i32 %idx.preloop, %len
; CHECK-NEXT: br i1 %abc.preloop, label %in.bounds.preloop, label %out.of.bounds.loopexit
entry:
%len = load i32, i32* %a_len_ptr, !range !0
br label %loop
loop:
%idx = phi i32 [ 100, %entry ], [ %idx.next, %in.bounds ]
%idx.next = add i32 %idx, -1
%abc = icmp ult i32 %idx, %len
br i1 %abc, label %in.bounds, label %out.of.bounds
in.bounds:
%addr = getelementptr i32, i32* %arr, i32 %idx
store i32 0, i32* %addr
%next = icmp ugt i32 %idx.next, 0
br i1 %next, label %loop, label %exit
out.of.bounds:
ret void
exit:
ret void
}
; Check SINT_MAX + 1, test is similar to test_01.
define void @test_03(i32* %arr, i32* %a_len_ptr) #0 {
; CHECK: test_03(
; CHECK: entry:
; CHECK-NEXT: %exit.mainloop.at = load i32, i32* %a_len_ptr, align 4, !range !0
; CHECK-NEXT: [[COND:%[^ ]+]] = icmp ult i32 0, %exit.mainloop.at
; CHECK-NEXT: br i1 [[COND]], label %loop.preheader, label %main.pseudo.exit
; CHECK: loop:
; CHECK-NEXT: %idx = phi i32 [ %idx.next, %in.bounds ], [ 0, %loop.preheader ]
; CHECK-NEXT: %idx.next = add nuw nsw i32 %idx, 1
; CHECK-NEXT: %abc = icmp ult i32 %idx, %exit.mainloop.at
; CHECK-NEXT: br i1 true, label %in.bounds, label %out.of.bounds.loopexit1
; CHECK-NOT: loop.preloop:
; CHECK: loop.postloop:
; CHECK-NEXT: %idx.postloop = phi i32 [ %idx.copy, %postloop ], [ %idx.next.postloop, %in.bounds.postloop ]
; CHECK-NEXT: %idx.next.postloop = add nuw nsw i32 %idx.postloop, 1
; CHECK-NEXT: %abc.postloop = icmp ult i32 %idx.postloop, %exit.mainloop.at
; CHECK-NEXT: br i1 %abc.postloop, label %in.bounds.postloop, label %out.of.bounds.loopexit
entry:
%len = load i32, i32* %a_len_ptr, !range !0
br label %loop
loop:
%idx = phi i32 [ 0, %entry ], [ %idx.next, %in.bounds ]
%idx.next = add nsw nuw i32 %idx, 1
%abc = icmp ult i32 %idx, %len
br i1 %abc, label %in.bounds, label %out.of.bounds
in.bounds:
%addr = getelementptr i32, i32* %arr, i32 %idx
store i32 0, i32* %addr
%next = icmp ugt i32 %idx.next, 2147483648
br i1 %next, label %exit, label %loop
out.of.bounds:
ret void
exit:
ret void
}
; Check SINT_MAX + 1, test is similar to test_02.
define void @test_04(i32* %arr, i32* %a_len_ptr) #0 {
; CHECK: test_04(
; CHECK: entry:
; CHECK-NEXT: %len = load i32, i32* %a_len_ptr, align 4, !range !0
; CHECK-NEXT: [[UMIN:%[^ ]+]] = call i32 @llvm.umax.i32(i32 %len, i32 1)
; CHECK-NEXT: %exit.preloop.at = add nsw i32 [[UMIN]], -1
; CHECK-NEXT: [[COND2:%[^ ]+]] = icmp ugt i32 -2147483648, %exit.preloop.at
; CHECK-NEXT: br i1 [[COND2]], label %loop.preloop.preheader, label %preloop.pseudo.exit
; CHECK: mainloop:
; CHECK-NEXT: br label %loop
; CHECK: loop:
; CHECK-NEXT: %idx = phi i32 [ %idx.preloop.copy, %mainloop ], [ %idx.next, %in.bounds ]
; CHECK-NEXT: %idx.next = add i32 %idx, -1
; CHECK-NEXT: %abc = icmp ult i32 %idx, %len
; CHECK-NEXT: br i1 true, label %in.bounds, label %out.of.bounds.loopexit1
; CHECK-NOT: loop.postloop:
; CHECK: loop.preloop:
; CHECK-NEXT: %idx.preloop = phi i32 [ %idx.next.preloop, %in.bounds.preloop ], [ -2147483648, %loop.preloop.preheader ]
; CHECK-NEXT: %idx.next.preloop = add i32 %idx.preloop, -1
; CHECK-NEXT: %abc.preloop = icmp ult i32 %idx.preloop, %len
; CHECK-NEXT: br i1 %abc.preloop, label %in.bounds.preloop, label %out.of.bounds.loopexit
entry:
%len = load i32, i32* %a_len_ptr, !range !0
br label %loop
loop:
%idx = phi i32 [ 2147483648, %entry ], [ %idx.next, %in.bounds ]
%idx.next = add i32 %idx, -1
%abc = icmp ult i32 %idx, %len
br i1 %abc, label %in.bounds, label %out.of.bounds
in.bounds:
%addr = getelementptr i32, i32* %arr, i32 %idx
store i32 0, i32* %addr
%next = icmp ugt i32 %idx.next, 0
br i1 %next, label %loop, label %exit
out.of.bounds:
ret void
exit:
ret void
}
; Increasing loop, UINT_MAX. Negative test: we cannot add 1 to UINT_MAX.
define void @test_05(i32* %arr, i32* %a_len_ptr) #0 {
; CHECK: test_05(
; CHECK-NOT: loop.preloop:
; CHECK-NOT: loop.postloop:
entry:
%len = load i32, i32* %a_len_ptr, !range !0
br label %loop
loop:
%idx = phi i32 [ 0, %entry ], [ %idx.next, %in.bounds ]
%idx.next = add nsw nuw i32 %idx, 1
%abc = icmp ult i32 %idx, %len
br i1 %abc, label %in.bounds, label %out.of.bounds
in.bounds:
%addr = getelementptr i32, i32* %arr, i32 %idx
store i32 0, i32* %addr
%next = icmp ugt i32 %idx.next, 4294967295
br i1 %next, label %exit, label %loop
out.of.bounds:
ret void
exit:
ret void
}
; Decreasing loop, UINT_MAX. Positive test.
define void @test_06(i32* %arr, i32* %a_len_ptr) #0 {
; CHECK: test_06(
; CHECK: mainloop:
; CHECK-NEXT: br label %loop
; CHECK: loop:
; CHECK-NEXT: %idx = phi i32 [ %idx.preloop.copy, %mainloop ], [ %idx.next, %in.bounds ]
; CHECK-NEXT: %idx.next = add nuw i32 %idx, -1
; CHECK-NEXT: %abc = icmp ult i32 %idx, %len
; CHECK-NEXT: br i1 true, label %in.bounds, label %out.of.bounds.loopexit1
; CHECK-NOT: loop.postloop:
; CHECK: loop.preloop:
; CHECK-NEXT: %idx.preloop = phi i32 [ %idx.next.preloop, %in.bounds.preloop ], [ -1, %loop.preloop.preheader ]
; CHECK-NEXT: %idx.next.preloop = add nuw i32 %idx.preloop, -1
; CHECK-NEXT: %abc.preloop = icmp ult i32 %idx.preloop, %len
; CHECK-NEXT: br i1 %abc.preloop, label %in.bounds.preloop, label %out.of.bounds.loopexit
entry:
%len = load i32, i32* %a_len_ptr, !range !0
br label %loop
loop:
%idx = phi i32 [ 4294967295, %entry ], [ %idx.next, %in.bounds ]
%idx.next = add nuw i32 %idx, -1
%abc = icmp ult i32 %idx, %len
br i1 %abc, label %in.bounds, label %out.of.bounds
in.bounds:
%addr = getelementptr i32, i32* %arr, i32 %idx
store i32 0, i32* %addr
%next = icmp ugt i32 %idx.next, 0
br i1 %next, label %loop, label %exit
out.of.bounds:
ret void
exit:
ret void
}
!0 = !{i32 0, i32 50}
Reference in New Issue View Git Blame Copy Permalink