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c83c29a7b7
There is no situation where this rarely-used argument cannot be substituted with a DIExpression and removing it allows us to simplify the DWARF backend. Note that this patch does not yet remove any of the newly dead code. rdar://problem/33580047 Differential Revision: https://reviews.llvm.org/D35951 llvm-svn: 309426
39 lines
1.1 KiB
LLVM
39 lines
1.1 KiB
LLVM
; RUN: opt -argpromotion -verify -dse -S %s -o - | FileCheck %s
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; Fix for PR33641. ArgumentPromotion removed the argument to bar but left the call to
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; dbg.value which still used the removed argument.
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%p_t = type i16*
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%fun_t = type void (%p_t)*
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define void @foo() {
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%tmp = alloca %fun_t
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store %fun_t @bar, %fun_t* %tmp
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ret void
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}
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define internal void @bar(%p_t %p) {
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call void @llvm.dbg.value(metadata %p_t %p, metadata !4, metadata !5), !dbg !6
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ret void
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}
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!2}
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!0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1)
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!1 = !DIFile(filename: "test.c", directory: "")
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!2 = !{i32 2, !"Debug Info Version", i32 3}
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!3 = distinct !DISubprogram(name: "bar", unit: !0)
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!4 = !DILocalVariable(name: "p", scope: !3)
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!5 = !DIExpression()
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!6 = !DILocation(line: 1, column: 1, scope: !3)
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; The %p argument should be removed, and the use of it in dbg.value should be
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; changed to undef.
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; CHECK: define internal void @bar() {
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; CHECK-NEXT: call void @llvm.dbg.value(metadata i16* undef
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; CHECK-NEXT: ret void
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; CHECK-NEXT: }
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