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| # RUN: llc -run-pass opt-phis -march=x86-64 -o - %s | FileCheck %s
--- |
define void @test() {
ret void
}
!llvm.dbg.cu = !{!1}
!llvm.module.flags = !{!2, !3}
!llvm.ident = !{!4}
!0 = !DIFile(filename: "foo.c", directory: "/bar")
!1 = distinct !DICompileUnit(language: DW_LANG_C, file: !0, producer: "My Compiler")
!2 = !{i32 2, !"Dwarf Version", i32 4}
!3 = !{i32 2, !"Debug Info Version", i32 3}
!4 = !{!"My Compiler"}
!5 = distinct !DISubprogram(name: "test")
!6 = !DILocation(line: 7, column: 11, scope: !5)
!7 = !DILocalVariable(name: "l", scope: !5)
...
---
name: test
tracksRegLiveness: true
body: |
bb.0:
%0:gr32 = IMPLICIT_DEF
bb.1:
%1:gr32 = PHI %0, %bb.0, %2, %bb.1
DBG_VALUE %1, _, !7, !DIExpression(), debug-location !6
%2:gr32 = IMPLICIT_DEF
JMP_1 %bb.1
...
# The PHI should be removed since it's only used in a DBG_VALUE
# CHECK-LABEL: bb.1:
# CHECK-NOT: PHI
|