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).
35 lines
722 B
LLVM
35 lines
722 B
LLVM
; RUN: opt < %s -passes=instcombine -S | grep "ret i32 %A"
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; RUN: opt < %s -passes=dce -S | not grep call.*llvm
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define i32 @test(i32 %A) {
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%X = or i1 false, false
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br i1 %X, label %T, label %C
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T: ; preds = %0
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%B = add i32 %A, 1
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br label %C
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C: ; preds = %T, %0
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%C.upgrd.1 = phi i32 [ %B, %T ], [ %A, %0 ]
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ret i32 %C.upgrd.1
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}
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define ptr @test2(i32 %width) {
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%tmp = call ptr @llvm.stacksave( )
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%tmp14 = alloca i32, i32 %width
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ret ptr %tmp14
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}
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declare ptr @llvm.stacksave()
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declare void @llvm.lifetime.start.p0(ptr)
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declare void @llvm.lifetime.end.p0(ptr)
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define void @test3() {
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%a = alloca i32
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call void @llvm.lifetime.start.p0(ptr %a)
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call void @llvm.lifetime.end.p0(ptr %a)
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ret void
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}
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