# RUN: llc %s -o - --run-pass=x86-cmov-conversion -mtriple=x86_64-- | FileCheck %s
# REQUIRES: x86-registered-target
#
# Check that when we create new blocks and PHIs to represent CMOVs, that the
# debug-instr-number is replaced on the new instruction, to preserve variable
# locations. Check that this still works when unfolding memory operands, which
# involves more decomposition of instructions.
#
# CHECK-LABEL: name: CmovInHotPath
# CHECK-LABEL: bb.3.for.body:
# CHECK: CMOV32rr {{.*}}, debug-instr-number 1
#
# CHECK-LABEL: name: test_cmov_memoperand_in_group_reuse_for_addr2
# CHECK-LABEL: bb.2.entry:
# CHECK-NEXT: PHI {{.*}} debug-instr-number 1,
# CHECK-NEXT: PHI {{.*}} debug-instr-number 2,
--- |
; ModuleID = 'x86-cmov-converter.ll'
source_filename = "x86-cmov-converter.ll"
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare void @llvm.dbg.value(metadata, metadata, metadata) #0
define void @CmovInHotPath(i32 %n, i32 %a, i32 %b, ptr nocapture %c, ptr nocapture readnone %d) !dbg !7 {
entry:
%cmp14 = icmp sgt i32 %n, 0, !dbg !12
br i1 %cmp14, label %for.body.preheader, label %for.cond.cleanup
for.body.preheader: ; preds = %entry
%wide.trip.count = zext i32 %n to i64, !dbg !13
br label %for.body
for.cond.cleanup: ; preds = %for.body, %entry
ret void
for.body: ; preds = %for.body, %for.body.preheader
%lsr.iv1 = phi ptr [ %uglygep, %for.body ], [ %c, %for.body.preheader ]
%lsr.iv = phi i64 [ %lsr.iv.next, %for.body ], [ %wide.trip.count, %for.body.preheader ]
%0 = load i32, ptr %lsr.iv1, align 4, !dbg !13
%add = add nsw i32 %0, 1, !dbg !13
%mul = mul nsw i32 %0, %a, !dbg !13
%cmp3 = icmp sgt i32 %mul, %b, !dbg !13
%. = select i1 %cmp3, i32 10, i32 %add, !dbg !13
call void @llvm.dbg.value(metadata i32 %., metadata !14, metadata !DIExpression()), !dbg !13
%mul7 = mul nsw i32 %., %add, !dbg !13
store i32 %mul7, ptr %lsr.iv1, align 4, !dbg !13
%lsr.iv.next = add nsw i64 %lsr.iv, -1, !dbg !13
%uglygep = getelementptr i8, ptr %lsr.iv1, i64 4, !dbg !13
%exitcond = icmp eq i64 %lsr.iv.next, 0, !dbg !13
br i1 %exitcond, label %for.cond.cleanup, label %for.body, !dbg !13
}
define i32 @test_cmov_memoperand_in_group_reuse_for_addr2(i32 %a, i32 %b, ptr %x, ptr %y) !dbg !15 {
entry:
%cond = icmp ugt i32 %a, %b, !dbg !16
%load1 = load ptr, ptr %y, align 8, !dbg !16
%p = select i1 %cond, ptr %x, ptr %load1, !dbg !16
call void @llvm.dbg.value(metadata ptr %p, metadata !17, metadata !DIExpression()), !dbg !16
%load2 = load i32, ptr %p, align 4, !dbg !16
%z = select i1 %cond, i32 %a, i32 %load2, !dbg !16
call void @llvm.dbg.value(metadata i32 %z, metadata !18, metadata !DIExpression()), !dbg !16
ret i32 %z, !dbg !16
}
attributes #0 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5}
!llvm.ident = !{!6}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
!1 = !DIFile(filename: "test.c", directory: "/tmp/out.c")
!2 = !{}
!3 = !{i32 7, !"Dwarf Version", i32 4}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"wchar_size", i32 4}
!6 = !{!""}
!7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 3, type: !8, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
!8 = !DISubroutineType(types: !9)
!9 = !{!10, !11, !11}
!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!11 = !DIBasicType(name: "long int", size: 64, encoding: DW_ATE_signed)
!12 = !DILocation(line: 16, column: 3, scope: !7)
!13 = !DILocation(line: 15, column: 3, scope: !7)
!14 = !DILocalVariable(name: "bar", arg: 1, scope: !7, file: !1, line: 3, type: !11)
!15 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 3, type: !8, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
!16 = !DILocation(line: 16, column: 3, scope: !15)
!17 = !DILocalVariable(name: "bar", arg: 1, scope: !15, file: !1, line: 3, type: !11)
!18 = !DILocalVariable(name: "baz", arg: 2, scope: !15, file: !1, line: 3, type: !11)
...
---
name: CmovInHotPath
tracksRegLiveness: true
debugInstrRef: true
registers:
- { id: 0, class: gr64, preferred-register: '' }
- { id: 1, class: gr64, preferred-register: '' }
- { id: 2, class: gr64, preferred-register: '' }
- { id: 3, class: gr64, preferred-register: '' }
- { id: 4, class: gr64, preferred-register: '' }
- { id: 5, class: gr32, preferred-register: '' }
- { id: 6, class: gr32, preferred-register: '' }
- { id: 7, class: gr32, preferred-register: '' }
liveins:
- { reg: '$edi', virtual-reg: '%5' }
- { reg: '$esi', virtual-reg: '%6' }
- { reg: '$edx', virtual-reg: '%7' }
- { reg: '$rcx', virtual-reg: '%8' }
machineFunctionInfo: {}
body: |
bb.0.entry:
successors: %bb.1(0x50000000), %bb.2(0x30000000)
liveins: $edi, $esi, $edx, $rcx
%8:gr64 = COPY $rcx
%7:gr32 = COPY $edx
%6:gr32 = COPY $esi
%5:gr32 = COPY $edi
TEST32rr %5, %5, implicit-def $eflags, debug-location !12
JCC_1 %bb.2, 14, implicit $eflags
JMP_1 %bb.1
bb.1.for.body.preheader:
successors: %bb.3(0x80000000)
%10:gr32 = MOV32rr %5, debug-location !13
%0:gr64 = SUBREG_TO_REG 0, killed %10, %subreg.sub_32bit, debug-location !13
JMP_1 %bb.3
bb.2.for.cond.cleanup:
RET 0
bb.3.for.body:
successors: %bb.2(0x04000000), %bb.3(0x7c000000)
%1:gr64 = PHI %8, %bb.1, %4, %bb.3
%2:gr64 = PHI %0, %bb.1, %3, %bb.3
%11:gr32 = MOV32rm %1, 1, $noreg, 0, $noreg, debug-location !13 :: (load (s32) from %ir.lsr.iv1)
%12:gr32 = nsw INC32r %11, implicit-def dead $eflags, debug-location !13
%13:gr32 = nsw IMUL32rr %11, %6, implicit-def dead $eflags, debug-location !13
%14:gr32 = SUB32rr %13, %7, implicit-def $eflags, debug-location !13
%15:gr32 = MOV32ri 10
%16:gr32 = CMOV32rr %12, killed %15, 15, implicit $eflags, debug-instr-number 1, debug-location !13
DBG_INSTR_REF !14, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(1, 0), debug-location !13
%17:gr32 = nsw IMUL32rr %16, %12, implicit-def dead $eflags, debug-location !13
MOV32mr %1, 1, $noreg, 0, $noreg, killed %17, debug-location !13 :: (store (s32) into %ir.lsr.iv1)
%4:gr64 = ADD64ri8 %1, 4, implicit-def dead $eflags, debug-location !13
%3:gr64 = DEC64r %2, implicit-def $eflags, debug-location !13
JCC_1 %bb.2, 4, implicit $eflags, debug-location !13
JMP_1 %bb.3, debug-location !13
...
---
name: test_cmov_memoperand_in_group_reuse_for_addr2
alignment: 16
tracksRegLiveness: true
debugInstrRef: true
registers:
- { id: 0, class: gr32, preferred-register: '' }
- { id: 1, class: gr32, preferred-register: '' }
- { id: 2, class: gr64, preferred-register: '' }
- { id: 3, class: gr64, preferred-register: '' }
- { id: 4, class: gr32, preferred-register: '' }
- { id: 5, class: gr64, preferred-register: '' }
- { id: 6, class: gr32, preferred-register: '' }
liveins:
- { reg: '$edi', virtual-reg: '%0' }
- { reg: '$esi', virtual-reg: '%1' }
- { reg: '$rdx', virtual-reg: '%2' }
- { reg: '$rcx', virtual-reg: '%3' }
debugValueSubstitutions: []
constants: []
machineFunctionInfo: {}
body: |
bb.0.entry:
liveins: $edi, $esi, $rdx, $rcx
%3:gr64 = COPY $rcx
%2:gr64 = COPY $rdx
%1:gr32 = COPY $esi
%0:gr32 = COPY $edi
%4:gr32 = SUB32rr %0, %1, implicit-def $eflags, debug-location !16
%5:gr64 = CMOV64rm %2, %3, 1, $noreg, 0, $noreg, 6, implicit $eflags, debug-instr-number 1, debug-location !16 :: (load (s64) from %ir.y)
DBG_INSTR_REF !17, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(1, 0), debug-location !16
%6:gr32 = CMOV32rm %0, killed %5, 1, $noreg, 0, $noreg, 6, implicit $eflags, debug-instr-number 2, debug-location !16 :: (load (s32) from %ir.p)
DBG_INSTR_REF !18, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(2, 0), debug-location !16
$eax = COPY %6, debug-location !16
RET 0, $eax, debug-location !16
...
Codebase Browser
llvm