59 lines
1.9 KiB
LLVM
59 lines
1.9 KiB
LLVM
; RUN: opt -debugify -loop-simplify -loop-extract -S < %s | FileCheck %s
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; This tests 2 cases:
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; 1. loop1 should be extracted into a function, without extracting %v1 alloca.
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; 2. loop2 should be extracted into a function, with the %v2 alloca.
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;
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; This used to produce an invalid IR, where `memcpy` will have a reference to
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; the, now, external value (local to the extracted loop function).
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; CHECK-LABEL: define void @test()
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; CHECK-NEXT: entry:
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; CHECK-NEXT: %v1 = alloca i32
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; CHECK-NEXT: call void @llvm.dbg.value(metadata i32* %v1
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; CHECK-NEXT: %p1 = bitcast i32* %v1 to i8*
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; CHECK-NEXT: call void @llvm.dbg.value(metadata i8* %p1,
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; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 undef, i8* %p1, i64 4, i1 true)
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; CHECK-LABEL: define internal void @test.loop2()
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; CHECK-NEXT: newFuncRoot:
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; CHECK-NEXT: %v2 = alloca i32
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; CHECK-NEXT: %p2 = bitcast i32* %v2 to i8*
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; CHECK-LABEL: define internal void @test.loop1(i8* %p1)
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; CHECK-NEXT: newFuncRoot:
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; CHECK-NEXT: br
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define void @test() {
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entry:
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%v1 = alloca i32, align 4
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%v2 = alloca i32, align 4
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%p1 = bitcast i32* %v1 to i8*
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%p2 = bitcast i32* %v2 to i8*
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 undef, i8* %p1, i64 4, i1 true)
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br label %loop1
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loop1:
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call void @llvm.lifetime.start.p0i8(i64 4, i8* %p1)
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%r1 = call i32 @foo(i8* %p1)
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call void @llvm.lifetime.end.p0i8(i64 4, i8* %p1)
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%cmp1 = icmp ne i32 %r1, 0
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br i1 %cmp1, label %loop1, label %loop2
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loop2:
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call void @llvm.lifetime.start.p0i8(i64 4, i8* %p2)
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%r2 = call i32 @foo(i8* %p2)
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call void @llvm.lifetime.end.p0i8(i64 4, i8* %p2)
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%cmp2 = icmp ne i32 %r2, 0
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br i1 %cmp2, label %loop2, label %exit
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exit:
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ret void
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}
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declare i32 @foo(i8*)
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declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture)
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declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture)
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declare void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias nocapture writeonly, i8* noalias nocapture readonly, i64, i1 immarg)
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