5b40a05d8f
When looking at PHI operand for combining, only look at instructions and arguments. The loop later iteraters over Arg's users, which is not useful if Arg is a constant -- it's users are not meaningful and might be in different functions, which causes problems for the dominates() query. Pull Request: https://github.com/llvm/llvm-project/pull/103302
45 lines
1.1 KiB
LLVM
45 lines
1.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
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; RUN: opt -S < %s -passes=instcombine | FileCheck %s
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; Verify that instcombine doesn't look at users of Constant in different
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; functions for dominates() queries.
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define void @f1(i1 %a) {
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; CHECK-LABEL: define void @f1(
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; CHECK-SAME: i1 [[A:%.*]]) {
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; CHECK-NEXT: br label %[[BB1:.*]]
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; CHECK: [[BB1]]:
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; CHECK-NEXT: br i1 [[A]], label %[[BB3:.*]], label %[[BB2:.*]]
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; CHECK: [[BB2]]:
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; CHECK-NEXT: br label %[[BB3]]
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; CHECK: [[BB3]]:
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; CHECK-NEXT: [[PHI:%.*]] = phi i64 [ 0, %[[BB2]] ], [ 1, %[[BB1]] ]
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; CHECK-NEXT: [[INTTOPTR:%.*]] = inttoptr i64 [[PHI]] to ptr
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; CHECK-NEXT: store i32 0, ptr [[INTTOPTR]], align 4
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; CHECK-NEXT: br label %[[BB1]]
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;
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br label %bb1
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bb1:
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br i1 %a, label %bb3, label %bb2
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bb2:
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br label %bb3
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bb3:
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%phi = phi i64 [ 0, %bb2 ], [ 1, %bb1 ]
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%inttoptr = inttoptr i64 %phi to ptr
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store i32 0, ptr %inttoptr, align 4
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br label %bb1
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}
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define void @f2() {
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; CHECK-LABEL: define void @f2() {
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; CHECK-NEXT: [[BB:.*:]]
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; CHECK-NEXT: ret void
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;
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bb:
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%inttoptr = inttoptr i64 0 to ptr
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ret void
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}
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