a700298b3d
This PR fixes #74572 where the freeze instruction could be found twice by the pass CanonicalizeFreezeInLoops, and then the compiling may crash in second removal since the instruction has already gone.
33 lines
1.0 KiB
LLVM
33 lines
1.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
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; RUN: opt < %s --passes=canon-freeze -S | FileCheck %s
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define void @check_duplicate_removal(i32 %n) {
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; CHECK-LABEL: define void @check_duplicate_removal(
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; CHECK-SAME: i32 [[N:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[N_FROZEN:%.*]] = freeze i32 [[N]]
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[T1:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[T3:%.*]], [[LOOP]] ]
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; CHECK-NEXT: [[T2:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[T3]], [[LOOP]] ]
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; CHECK-NEXT: [[T3]] = add i32 [[N_FROZEN]], [[T2]]
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; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[T2]], 0
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; CHECK-NEXT: br i1 [[COND]], label [[LOOP]], label [[EXIT:%.*]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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;
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entry:
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br label %loop
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loop:
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%t1 = phi i32 [ 0, %entry], [%t3, %loop ]
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%t2 = phi i32 [ 0, %entry], [%t3, %loop ]
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%t3 = add i32 %n, %t2
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%.fr = freeze i32 %t3
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%cond = icmp eq i32 %t2, 0
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br i1 %cond, label %loop, label %exit
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exit:
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ret void
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}
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