3bf72bf427
CodeExtractor shifts dbg.value intrinsics out of the region being extracted and updates them to be appropriate in the extracted function. With new non-intrinsic variable locations, we need to manually do this too, with DPValues. Most of this patch shifts and refactors some utilities in fixupDebugInfoPostExtraction so that we can add a single extra helper lambda that iterates over DPValues and applies update-utilities. We also have to assign the IsNewDbgInfoFormat flag in a bunch of places -- this normally gets set the moment you insert a block into a function (or function into a module), however a few blocks are constructed here before being inserted, thus we have to do some manual setup. Tested via LoopExtractor_alloca.ll, which invokes debugify.
55 lines
1.8 KiB
LLVM
55 lines
1.8 KiB
LLVM
; RUN: opt -passes=debugify,loop-simplify,loop-extract -S < %s | FileCheck %s
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; RUN: opt -passes=debugify,loop-simplify,loop-extract -S < %s --try-experimental-debuginfo-iterators | 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 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: 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(i64 4, ptr %v1)
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%r1 = call i32 @foo(ptr %v1)
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call void @llvm.lifetime.end.p0(i64 4, 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(i64 4, ptr %v2)
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%r2 = call i32 @foo(ptr %v2)
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call void @llvm.lifetime.end.p0(i64 4, 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(i64 immarg, ptr nocapture)
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declare void @llvm.lifetime.end.p0(i64 immarg, 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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