c23b4fbdbb
Now that #149310 has restricted lifetime intrinsics to only work on allocas, we can also drop the explicit size argument. Instead, the size is implied by the alloca. This removes the ability to only mark a prefix of an alloca alive/dead. We never used that capability, so we should remove the need to handle that possibility everywhere (though many key places, including stack coloring, did not actually respect this).
55 lines
1.7 KiB
LLVM
55 lines
1.7 KiB
LLVM
; RUN: opt -passes=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: #dbg_value(ptr %v1
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; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 undef, ptr %v1, 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-LABEL: define internal void @test.loop1(ptr %v1)
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; CHECK-NEXT: newFuncRoot:
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; CHECK-NEXT: #dbg_value
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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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call void @llvm.memcpy.p0.p0.i64(ptr align 4 undef, ptr %v1, 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.p0(ptr %v1)
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%r1 = call i32 @foo(ptr %v1)
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call void @llvm.lifetime.end.p0(ptr %v1)
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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.p0(ptr %v2)
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%r2 = call i32 @foo(ptr %v2)
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call void @llvm.lifetime.end.p0(ptr %v2)
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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(ptr)
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declare void @llvm.lifetime.start.p0(ptr nocapture)
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declare void @llvm.lifetime.end.p0(ptr nocapture)
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declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg)
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