# Check that the backend can handle consecutive select instructions also in
# the presence of DEBUG_VALUE machine instructions, which should be moved.
#
# RUN: llc %s -mtriple=s390x-linux-gnu -mcpu=z13 -run-pass=finalize-isel \
# RUN: -o - 2>&1 | FileCheck %s
# RUN: llc %s -mtriple=s390x-linux-gnu -mcpu=z13 -passes=finalize-isel \
# RUN: -o - 2>&1 | FileCheck %s
#
# CHECK-LABEL: bb.1 (%ir-block.0):
# CHECK-NEXT: %5:fp32bit = PHI %1, %bb.0, %2, %bb.2
# CHECK-NEXT: %6:fp32bit = PHI %3, %bb.0, %4, %bb.2
# CHECK-NEXT: %7:fp32bit = PHI %1, %bb.0, %4, %bb.2
# CHECK-NEXT: DBG_VALUE %5, $noreg, !5, !DIExpression(), debug-location !9
# CHECK-NEXT: DBG_VALUE %6, $noreg, !5, !DIExpression(), debug-location !9
# CHECK-NEXT: %8:fp32bit = AEBR %5, killed %6, implicit-def dead $cc, implicit $fpc
--- |
; ModuleID = 'tc.ll'
source_filename = "tc.ll"
target datalayout = "E-m:e-i1:8:16-i8:8:16-i64:64-f128:64-v128:64-a:8:16-n32:64"
define float @fun(i1 %cmp, float %arg0, float %arg1, float %arg2, float %arg3, float %arg4) #0 {
%fs0 = select i1 %cmp, float %arg0, float %arg1
; Keep the dbg metadata live by referencing it in the IR.
call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !7, metadata !DIExpression()), !dbg !9
%fs1 = select i1 %cmp, float %arg2, float %arg3
call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !7, metadata !DIExpression()), !dbg !9
%fs2 = select i1 %cmp, float %arg0, float %arg3
%s0 = fadd float %fs0, %fs1
%s1 = fadd float %s0, %fs2
ret float %s1
}
declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #1
attributes #0 = { "target-cpu"="z13" }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "llvm", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
!1 = !DIFile(filename: "test.ll", directory: "/tmp")
!2 = !{}
!3 = !{i32 2, !"Dwarf Version", i32 4}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = distinct !DISubprogram(name: "test_dbg_value", scope: !1, file: !1, line: 1, type: !6, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
!6 = !DISubroutineType(types: !2)
!7 = !DILocalVariable(name: "in", arg: 1, scope: !5, file: !1, line: 1, type: !8)
!8 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!9 = !DILocation(line: 1, column: 1, scope: !5)
...
---
name: fun
alignment: 16
tracksRegLiveness: true
registers:
- { id: 0, class: gr32bit }
- { id: 1, class: fp32bit }
- { id: 2, class: fp32bit }
- { id: 3, class: fp32bit }
- { id: 4, class: fp32bit }
- { id: 5, class: fp32bit }
- { id: 6, class: fp32bit }
- { id: 7, class: fp32bit }
- { id: 8, class: fp32bit }
- { id: 9, class: fp32bit }
liveins:
- { reg: '$r2l', virtual-reg: '%0' }
- { reg: '$f0s', virtual-reg: '%1' }
- { reg: '$f2s', virtual-reg: '%2' }
- { reg: '$f4s', virtual-reg: '%3' }
- { reg: '$f6s', virtual-reg: '%4' }
frameInfo:
maxAlignment: 8
fixedStack:
- { id: 0, size: 4, alignment: 8, stack-id: default, isImmutable: true }
body: |
bb.0 (%ir-block.0):
liveins: $r2l, $f0s, $f2s, $f4s, $f6s
%4:fp32bit = COPY $f6s
%3:fp32bit = COPY $f4s
%2:fp32bit = COPY $f2s
%1:fp32bit = COPY $f0s
%0:gr32bit = COPY $r2l
TMLMux %0, 1, implicit-def $cc
%5:fp32bit = SelectVR32 %1, %2, 15, 7, implicit $cc
DBG_VALUE %5, $noreg, !7, !DIExpression(), debug-location !9
%6:fp32bit = SelectVR32 %3, %4, 15, 7, implicit $cc
DBG_VALUE %6, $noreg, !7, !DIExpression(), debug-location !9
%7:fp32bit = SelectVR32 %1, %4, 15, 7, implicit $cc
%8:fp32bit = AEBR %5, killed %6, implicit-def dead $cc, implicit $fpc
%9:fp32bit = AEBR %8, killed %7, implicit-def dead $cc, implicit $fpc
$f0s = COPY %9
Return implicit $f0s
...
Codebase Browser
llvm