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TheRock/compiler/amd-llvm/llvm/test/Transforms/FixIrreducible/unreachable.ll
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derek.holloway 7502bf64a4
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2026-09-02 16:34:47 -07:00

51 lines
1.1 KiB
LLVM

; NOTE: Do not autogenerate
; RUN: opt < %s -fix-irreducible --verify-loop-info -S | FileCheck %s
; RUN: opt < %s -passes='fix-irreducible,verify<loops>' -S | FileCheck %s
; RUN: opt < %s -passes='verify<loops>,fix-irreducible,verify<loops>' -S | FileCheck %s
; CHECK-LABEL: @unreachable(
; CHECK: entry:
; CHECK-NOT: irr.guard:
define void @unreachable(i32 %n, i1 %arg) {
entry:
br label %loop.body
loop.body:
br label %inner.block
unreachable.block:
br label %inner.block
inner.block:
br i1 %arg, label %loop.exit, label %loop.latch
loop.latch:
br label %loop.body
loop.exit:
ret void
}
; CHECK-LABEL: @unreachable_callbr(
; CHECK: entry:
; CHECK-NOT: irr.guard:
define void @unreachable_callbr(i32 %n, i1 %arg) {
entry:
callbr void asm "", ""() to label %loop.body []
loop.body:
callbr void asm "", ""() to label %inner.block []
unreachable.block:
callbr void asm "", ""() to label %inner.block []
inner.block:
callbr void asm "", "r,!i"(i1 %arg) to label %loop.exit [label %loop.latch]
loop.latch:
callbr void asm "", ""() to label %loop.body []
loop.exit:
ret void
}