20cbb6cdf8
I'm about to enable the new loop predication transform by default. It has the effect of completely destroying many read only loops - which happen to be a super common idiom in our test cases. So as to preserve test coverage of other transforms, disable the new transform where it would cause sharp test coverage regressions. (This is semantically part of the enabling commit. It's committed separate to ease revert if the actual flag flip gets reverted.)
197 lines
7.3 KiB
LLVM
197 lines
7.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
|
; RUN: opt -indvars -S -indvars-predicate-loops=0 < %s | FileCheck %s
|
|
|
|
target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
|
|
|
|
define i32 @remove_loop(i32 %size) {
|
|
; CHECK-LABEL: @remove_loop(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[SIZE:%.*]], 31
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i32 [[SIZE]], 31
|
|
; CHECK-NEXT: [[UMAX:%.*]] = select i1 [[TMP1]], i32 [[SIZE]], i32 31
|
|
; CHECK-NEXT: [[TMP2:%.*]] = sub i32 [[TMP0]], [[UMAX]]
|
|
; CHECK-NEXT: [[TMP3:%.*]] = lshr i32 [[TMP2]], 5
|
|
; CHECK-NEXT: [[TMP4:%.*]] = shl i32 [[TMP3]], 5
|
|
; CHECK-NEXT: br label [[WHILE_COND:%.*]]
|
|
; CHECK: while.cond:
|
|
; CHECK-NEXT: [[SIZE_ADDR_0:%.*]] = phi i32 [ [[SIZE]], [[ENTRY:%.*]] ], [ [[SUB:%.*]], [[WHILE_COND]] ]
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[SIZE_ADDR_0]], 31
|
|
; CHECK-NEXT: [[SUB]] = add i32 [[SIZE_ADDR_0]], -32
|
|
; CHECK-NEXT: br i1 [[CMP]], label [[WHILE_COND]], label [[WHILE_END:%.*]]
|
|
; CHECK: while.end:
|
|
; CHECK-NEXT: [[TMP5:%.*]] = sub i32 [[SIZE]], [[TMP4]]
|
|
; CHECK-NEXT: ret i32 [[TMP5]]
|
|
;
|
|
entry:
|
|
br label %while.cond
|
|
|
|
while.cond: ; preds = %while.cond, %entry
|
|
%size.addr.0 = phi i32 [ %size, %entry ], [ %sub, %while.cond ]
|
|
%cmp = icmp ugt i32 %size.addr.0, 31
|
|
%sub = add i32 %size.addr.0, -32
|
|
br i1 %cmp, label %while.cond, label %while.end
|
|
|
|
while.end: ; preds = %while.cond
|
|
%size.lcssa = phi i32 [ %size.addr.0, %while.cond ]
|
|
ret i32 %size.lcssa
|
|
}
|
|
|
|
define i32 @used_loop(i32 %size) minsize {
|
|
; CHECK-LABEL: @used_loop(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br label [[WHILE_COND:%.*]]
|
|
; CHECK: while.cond:
|
|
; CHECK-NEXT: [[SIZE_ADDR_0:%.*]] = phi i32 [ [[SIZE:%.*]], [[ENTRY:%.*]] ], [ [[SUB:%.*]], [[WHILE_COND]] ]
|
|
; CHECK-NEXT: tail call void @call()
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[SIZE_ADDR_0]], 31
|
|
; CHECK-NEXT: [[SUB]] = add i32 [[SIZE_ADDR_0]], -32
|
|
; CHECK-NEXT: br i1 [[CMP]], label [[WHILE_COND]], label [[WHILE_END:%.*]]
|
|
; CHECK: while.end:
|
|
; CHECK-NEXT: [[SIZE_LCSSA:%.*]] = phi i32 [ [[SIZE_ADDR_0]], [[WHILE_COND]] ]
|
|
; CHECK-NEXT: ret i32 [[SIZE_LCSSA]]
|
|
;
|
|
entry:
|
|
br label %while.cond
|
|
|
|
while.cond: ; preds = %while.cond, %entry
|
|
%size.addr.0 = phi i32 [ %size, %entry ], [ %sub, %while.cond ]
|
|
tail call void @call()
|
|
%cmp = icmp ugt i32 %size.addr.0, 31
|
|
%sub = add i32 %size.addr.0, -32
|
|
br i1 %cmp, label %while.cond, label %while.end
|
|
|
|
while.end: ; preds = %while.cond
|
|
%size.lcssa = phi i32 [ %size.addr.0, %while.cond ]
|
|
ret i32 %size.lcssa
|
|
}
|
|
|
|
|
|
define i32 @test_signed_while(i32 %S) {
|
|
; CHECK-LABEL: @test_signed_while(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br label [[WHILE_COND:%.*]]
|
|
; CHECK: while.cond:
|
|
; CHECK-NEXT: [[S_ADDR_0:%.*]] = phi i32 [ [[S:%.*]], [[ENTRY:%.*]] ], [ [[SUB:%.*]], [[WHILE_BODY:%.*]] ]
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[S_ADDR_0]], 31
|
|
; CHECK-NEXT: br i1 [[CMP]], label [[WHILE_BODY]], label [[WHILE_END:%.*]]
|
|
; CHECK: while.body:
|
|
; CHECK-NEXT: [[SUB]] = add nsw i32 [[S_ADDR_0]], -32
|
|
; CHECK-NEXT: tail call void @call()
|
|
; CHECK-NEXT: br label [[WHILE_COND]]
|
|
; CHECK: while.end:
|
|
; CHECK-NEXT: [[S_ADDR_0_LCSSA:%.*]] = phi i32 [ [[S_ADDR_0]], [[WHILE_COND]] ]
|
|
; CHECK-NEXT: ret i32 [[S_ADDR_0_LCSSA]]
|
|
;
|
|
entry:
|
|
br label %while.cond
|
|
|
|
while.cond: ; preds = %while.body, %entry
|
|
%S.addr.0 = phi i32 [ %S, %entry ], [ %sub, %while.body ]
|
|
%cmp = icmp sgt i32 %S.addr.0, 31
|
|
br i1 %cmp, label %while.body, label %while.end
|
|
|
|
while.body: ; preds = %while.cond
|
|
%sub = add nsw i32 %S.addr.0, -32
|
|
tail call void @call()
|
|
br label %while.cond
|
|
|
|
while.end: ; preds = %while.cond
|
|
%S.addr.0.lcssa = phi i32 [ %S.addr.0, %while.cond ]
|
|
ret i32 %S.addr.0.lcssa
|
|
}
|
|
|
|
define i32 @test_signed_do(i32 %S) {
|
|
; CHECK-LABEL: @test_signed_do(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br label [[DO_BODY:%.*]]
|
|
; CHECK: do.body:
|
|
; CHECK-NEXT: [[S_ADDR_0:%.*]] = phi i32 [ [[S:%.*]], [[ENTRY:%.*]] ], [ [[SUB:%.*]], [[DO_BODY]] ]
|
|
; CHECK-NEXT: [[SUB]] = add nsw i32 [[S_ADDR_0]], -16
|
|
; CHECK-NEXT: tail call void @call()
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[SUB]], 15
|
|
; CHECK-NEXT: br i1 [[CMP]], label [[DO_BODY]], label [[DO_END:%.*]]
|
|
; CHECK: do.end:
|
|
; CHECK-NEXT: [[SUB_LCSSA:%.*]] = phi i32 [ [[SUB]], [[DO_BODY]] ]
|
|
; CHECK-NEXT: ret i32 [[SUB_LCSSA]]
|
|
;
|
|
entry:
|
|
br label %do.body
|
|
|
|
do.body: ; preds = %do.body, %entry
|
|
%S.addr.0 = phi i32 [ %S, %entry ], [ %sub, %do.body ]
|
|
%sub = add nsw i32 %S.addr.0, -16
|
|
tail call void @call()
|
|
%cmp = icmp sgt i32 %sub, 15
|
|
br i1 %cmp, label %do.body, label %do.end
|
|
|
|
do.end: ; preds = %do.body
|
|
%sub.lcssa = phi i32 [ %sub, %do.body ]
|
|
ret i32 %sub.lcssa
|
|
}
|
|
|
|
define i32 @test_unsigned_while(i32 %S) {
|
|
; CHECK-LABEL: @test_unsigned_while(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br label [[WHILE_COND:%.*]]
|
|
; CHECK: while.cond:
|
|
; CHECK-NEXT: [[S_ADDR_0:%.*]] = phi i32 [ [[S:%.*]], [[ENTRY:%.*]] ], [ [[SUB:%.*]], [[WHILE_BODY:%.*]] ]
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[S_ADDR_0]], 15
|
|
; CHECK-NEXT: br i1 [[CMP]], label [[WHILE_BODY]], label [[WHILE_END:%.*]]
|
|
; CHECK: while.body:
|
|
; CHECK-NEXT: [[SUB]] = add i32 [[S_ADDR_0]], -16
|
|
; CHECK-NEXT: tail call void @call()
|
|
; CHECK-NEXT: br label [[WHILE_COND]]
|
|
; CHECK: while.end:
|
|
; CHECK-NEXT: [[S_ADDR_0_LCSSA:%.*]] = phi i32 [ [[S_ADDR_0]], [[WHILE_COND]] ]
|
|
; CHECK-NEXT: ret i32 [[S_ADDR_0_LCSSA]]
|
|
;
|
|
entry:
|
|
br label %while.cond
|
|
|
|
while.cond: ; preds = %while.body, %entry
|
|
%S.addr.0 = phi i32 [ %S, %entry ], [ %sub, %while.body ]
|
|
%cmp = icmp ugt i32 %S.addr.0, 15
|
|
br i1 %cmp, label %while.body, label %while.end
|
|
|
|
while.body: ; preds = %while.cond
|
|
%sub = add i32 %S.addr.0, -16
|
|
tail call void @call()
|
|
br label %while.cond
|
|
|
|
while.end: ; preds = %while.cond
|
|
%S.addr.0.lcssa = phi i32 [ %S.addr.0, %while.cond ]
|
|
ret i32 %S.addr.0.lcssa
|
|
}
|
|
|
|
define i32 @test_unsigned_do(i32 %S) {
|
|
; CHECK-LABEL: @test_unsigned_do(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br label [[DO_BODY:%.*]]
|
|
; CHECK: do.body:
|
|
; CHECK-NEXT: [[S_ADDR_0:%.*]] = phi i32 [ [[S:%.*]], [[ENTRY:%.*]] ], [ [[SUB:%.*]], [[DO_BODY]] ]
|
|
; CHECK-NEXT: [[SUB]] = add i32 [[S_ADDR_0]], -16
|
|
; CHECK-NEXT: tail call void @call()
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[SUB]], 15
|
|
; CHECK-NEXT: br i1 [[CMP]], label [[DO_BODY]], label [[DO_END:%.*]]
|
|
; CHECK: do.end:
|
|
; CHECK-NEXT: [[SUB_LCSSA:%.*]] = phi i32 [ [[SUB]], [[DO_BODY]] ]
|
|
; CHECK-NEXT: ret i32 [[SUB_LCSSA]]
|
|
;
|
|
entry:
|
|
br label %do.body
|
|
|
|
do.body: ; preds = %do.body, %entry
|
|
%S.addr.0 = phi i32 [ %S, %entry ], [ %sub, %do.body ]
|
|
%sub = add i32 %S.addr.0, -16
|
|
tail call void @call()
|
|
%cmp = icmp ugt i32 %sub, 15
|
|
br i1 %cmp, label %do.body, label %do.end
|
|
|
|
do.end: ; preds = %do.body
|
|
%sub.lcssa = phi i32 [ %sub, %do.body ]
|
|
ret i32 %sub.lcssa
|
|
}
|
|
|
|
|
|
declare void @call()
|