aa2009fe78
First step after e113317958,
in these tests, DomTree is valid afterwards, so mark them as such,
so that they don't regress.
In further steps, SimplifyCFG transforms shall taught to preserve DomTree,
in as small steps as possible.
126 lines
2.5 KiB
LLVM
126 lines
2.5 KiB
LLVM
; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s
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; PR2967
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target datalayout =
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"e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32"
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target triple = "i386-pc-linux-gnu"
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define void @test1(i32 %x) nounwind {
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entry:
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%0 = icmp eq i32 %x, 0 ; <i1> [#uses=1]
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br i1 %0, label %bb, label %return
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bb: ; preds = %entry
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%1 = load volatile i32, i32* null
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unreachable
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br label %return
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return: ; preds = %entry
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ret void
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; CHECK-LABEL: @test1(
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; CHECK: load volatile
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}
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define void @test1_no_null_opt(i32 %x) nounwind #0 {
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entry:
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%0 = icmp eq i32 %x, 0 ; <i1> [#uses=1]
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br i1 %0, label %bb, label %return
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bb: ; preds = %entry
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%1 = load volatile i32, i32* null
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unreachable
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br label %return
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return: ; preds = %entry
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ret void
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; CHECK-LABEL: @test1_no_null_opt(
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; CHECK: load volatile
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; CHECK: unreachable
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}
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; rdar://7958343
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define void @test2() nounwind {
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entry:
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store i32 4,i32* null
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ret void
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; CHECK-LABEL: @test2(
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; CHECK: call void @llvm.trap
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; CHECK: unreachable
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}
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define void @test2_no_null_opt() nounwind #0 {
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entry:
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store i32 4,i32* null
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ret void
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; CHECK-LABEL: @test2_no_null_opt(
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; CHECK: store i32 4, i32* null
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; CHECK-NOT: call void @llvm.trap
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; CHECK: ret
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}
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; PR7369
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define void @test3() nounwind {
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entry:
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store volatile i32 4, i32* null
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ret void
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; CHECK-LABEL: @test3(
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; CHECK: store volatile i32 4, i32* null
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; CHECK: ret
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}
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define void @test3_no_null_opt() nounwind #0 {
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entry:
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store volatile i32 4, i32* null
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ret void
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; CHECK-LABEL: @test3_no_null_opt(
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; CHECK: store volatile i32 4, i32* null
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; CHECK: ret
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}
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; Check store before unreachable.
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define void @test4(i1 %C, i32* %P) {
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; CHECK-LABEL: @test4(
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; CHECK: entry:
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; CHECK-NEXT: br i1 %C
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entry:
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br i1 %C, label %T, label %F
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T:
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store volatile i32 0, i32* %P
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unreachable
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F:
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ret void
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}
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; Check cmpxchg before unreachable.
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define void @test5(i1 %C, i32* %P) {
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; CHECK-LABEL: @test5(
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; CHECK: entry:
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; CHECK-NEXT: br i1 %C
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entry:
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br i1 %C, label %T, label %F
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T:
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cmpxchg volatile i32* %P, i32 0, i32 1 seq_cst seq_cst
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unreachable
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F:
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ret void
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}
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; Check atomicrmw before unreachable.
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define void @test6(i1 %C, i32* %P) {
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; CHECK-LABEL: @test6(
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; CHECK: entry:
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; CHECK-NEXT: br i1 %C
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entry:
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br i1 %C, label %T, label %F
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T:
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atomicrmw volatile xchg i32* %P, i32 0 seq_cst
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unreachable
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F:
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ret void
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}
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attributes #0 = { null_pointer_is_valid }
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