[llvm] r364829 - [X86] Avoid SFB - Fix inconsistent codegen with/without debug info(2)
Robert Lougher via llvm-commits
llvm-commits at lists.llvm.org
Mon Jul 1 11:28:21 PDT 2019
Author: rlougher
Date: Mon Jul 1 11:28:21 2019
New Revision: 364829
URL: http://llvm.org/viewvc/llvm-project?rev=364829&view=rev
Log:
[X86] Avoid SFB - Fix inconsistent codegen with/without debug info(2)
The function findPotentialBlockers may consider debug info instructions as
potential blockers and may stop searching for a store-load pair prematurely.
This patch corrects this and tests the cases where the store is separated
from the load by more than InspectionLimit debug instructions.
Patch by Chris Dawson.
Differential Revision: https://reviews.llvm.org/D62408
Added:
llvm/trunk/test/CodeGen/X86/avoid-sfb-g-no-change2.mir
llvm/trunk/test/CodeGen/X86/avoid-sfb-g-no-change3.mir
Modified:
llvm/trunk/lib/Target/X86/X86AvoidStoreForwardingBlocks.cpp
Modified: llvm/trunk/lib/Target/X86/X86AvoidStoreForwardingBlocks.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86AvoidStoreForwardingBlocks.cpp?rev=364829&r1=364828&r2=364829&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86AvoidStoreForwardingBlocks.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86AvoidStoreForwardingBlocks.cpp Mon Jul 1 11:28:21 2019
@@ -340,6 +340,8 @@ findPotentialBlockers(MachineInstr *Load
for (auto PBInst = std::next(MachineBasicBlock::reverse_iterator(LoadInst)),
E = LoadInst->getParent()->rend();
PBInst != E; ++PBInst) {
+ if (PBInst->isMetaInstruction())
+ continue;
BlockCount++;
if (BlockCount >= InspectionLimit)
break;
@@ -363,6 +365,8 @@ findPotentialBlockers(MachineInstr *Load
for (MachineBasicBlock::reverse_iterator PBInst = PMBB->rbegin(),
PME = PMBB->rend();
PBInst != PME; ++PBInst) {
+ if (PBInst->isMetaInstruction())
+ continue;
PredCount++;
if (PredCount >= LimitLeft)
break;
Added: llvm/trunk/test/CodeGen/X86/avoid-sfb-g-no-change2.mir
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/avoid-sfb-g-no-change2.mir?rev=364829&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/X86/avoid-sfb-g-no-change2.mir (added)
+++ llvm/trunk/test/CodeGen/X86/avoid-sfb-g-no-change2.mir Mon Jul 1 11:28:21 2019
@@ -0,0 +1,198 @@
+# RUN: llc %s -run-pass x86-avoid-SFB -mtriple=x86_64-unknown-linux-gnu -o - | FileCheck %s
+#
+# This was generated from:
+#
+# using alpha = float __attribute__((ext_vector_type(4)));
+#
+# void bravo(alpha * __restrict__ p1, alpha * __restrict__ p2) {
+# char *p3 = (char *)p1;
+# *p3 = 0;
+# alpha t = *p1;
+# *p2 = t;
+# }
+#
+# Using the command line:
+# clang -g -c 1.cpp -O2 -S -emit-llvm -fno-strict-aliasing --target=x86_64-unknown-unknown -o test.ll
+# llc -stop-before=x86-avoid-SFB test.ll -o before.mir
+#
+# The IR has been modified to include a number of debug/meta instructions between the initial store and load.
+# If the code treats debug/meta instructions as normal instructions, the separation between the store and load
+# will be too great to enable the optimization.
+
+--- |
+ ; ModuleID = 'test.ll'
+ source_filename = "1.cpp"
+ target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+ target triple = "x86_64-unknown-unknown"
+
+ ; Function Attrs: norecurse nounwind uwtable
+ define dso_local void @debug(<4 x float>* noalias nocapture %p1, <4 x float>* noalias nocapture %p2) local_unnamed_addr #0 !dbg !10 {
+ entry:
+ call void @llvm.dbg.value(metadata <4 x float>* %p1, metadata !21, metadata !DIExpression()), !dbg !25
+ call void @llvm.dbg.value(metadata <4 x float>* %p2, metadata !22, metadata !DIExpression()), !dbg !25
+ %0 = bitcast <4 x float>* %p1 to i8*, !dbg !26
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !25
+ store i8 0, i8* %0, align 1, !dbg !27
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !25
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !25
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !25
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !25
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !25
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !25
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !25
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !25
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !25
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !25
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !25
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !25
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !25
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !25
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !25
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !25
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !25
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !25
+ %1 = load <4 x float>, <4 x float>* %p1, align 16, !dbg !28
+ call void @llvm.dbg.value(metadata <4 x float> %1, metadata !24, metadata !DIExpression()), !dbg !25
+ store <4 x float> %1, <4 x float>* %p2, align 16, !dbg !29
+ ret void, !dbg !30
+ }
+
+ ; Function Attrs: nounwind readnone speculatable
+ declare void @llvm.dbg.value(metadata, metadata, metadata) #1
+
+ ; Function Attrs: nounwind
+ declare void @llvm.stackprotector(i8*, i8**) #2
+
+ attributes #0 = { norecurse nounwind uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
+ attributes #1 = { nounwind readnone speculatable }
+ attributes #2 = { nounwind }
+
+ !llvm.dbg.cu = !{!0}
+ !llvm.module.flags = !{!6, !7, !8}
+ !llvm.ident = !{!9}
+
+ !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 9.0.0 (https://github.com/llvm/llvm-project.git 9afc4764dd24bd2f23c44e51ad33f8e58234a8b6)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, nameTableKind: None)
+ !1 = !DIFile(filename: "1.cpp", directory: "C:\5CUsers\5Cgbdawsoc\5CDocuments\5Cllvm\5Cbg40969")
+ !2 = !{}
+ !3 = !{!4}
+ !4 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !5, size: 64)
+ !5 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
+ !6 = !{i32 2, !"Dwarf Version", i32 4}
+ !7 = !{i32 2, !"Debug Info Version", i32 3}
+ !8 = !{i32 1, !"wchar_size", i32 4}
+ !9 = !{!"clang version 9.0.0 (https://github.com/llvm/llvm-project.git 9afc4764dd24bd2f23c44e51ad33f8e58234a8b6)"}
+ !10 = distinct !DISubprogram(name: "bravo", linkageName: "_Z5bravoPDv4_fS0_", scope: !1, file: !1, line: 4, type: !11, scopeLine: 4, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !20)
+ !11 = !DISubroutineType(types: !12)
+ !12 = !{null, !13, !13}
+ !13 = !DIDerivedType(tag: DW_TAG_restrict_type, baseType: !14)
+ !14 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !15, size: 64)
+ !15 = !DIDerivedType(tag: DW_TAG_typedef, name: "alpha", file: !1, line: 2, baseType: !16)
+ !16 = !DICompositeType(tag: DW_TAG_array_type, baseType: !17, size: 128, flags: DIFlagVector, elements: !18)
+ !17 = !DIBasicType(name: "float", size: 32, encoding: DW_ATE_float)
+ !18 = !{!19}
+ !19 = !DISubrange(count: 4)
+ !20 = !{!21, !22, !23, !24}
+ !21 = !DILocalVariable(name: "p1", arg: 1, scope: !10, file: !1, line: 4, type: !13)
+ !22 = !DILocalVariable(name: "p2", arg: 2, scope: !10, file: !1, line: 4, type: !13)
+ !23 = !DILocalVariable(name: "p3", scope: !10, file: !1, line: 5, type: !4)
+ !24 = !DILocalVariable(name: "t", scope: !10, file: !1, line: 7, type: !15)
+ !25 = !DILocation(line: 0, scope: !10)
+ !26 = !DILocation(line: 5, column: 14, scope: !10)
+ !27 = !DILocation(line: 6, column: 7, scope: !10)
+ !28 = !DILocation(line: 7, column: 13, scope: !10)
+ !29 = !DILocation(line: 8, column: 7, scope: !10)
+ !30 = !DILocation(line: 9, column: 1, scope: !10)
+
+...
+---
+name: debug
+alignment: 4
+exposesReturnsTwice: false
+legalized: false
+regBankSelected: false
+selected: false
+failedISel: false
+tracksRegLiveness: true
+hasWinCFI: false
+registers:
+ - { id: 0, class: gr64, preferred-register: '' }
+ - { id: 1, class: gr64, preferred-register: '' }
+ - { id: 2, class: vr128, preferred-register: '' }
+liveins:
+ - { reg: '$rdi', virtual-reg: '%0' }
+ - { reg: '$rsi', virtual-reg: '%1' }
+frameInfo:
+ isFrameAddressTaken: false
+ isReturnAddressTaken: false
+ hasStackMap: false
+ hasPatchPoint: false
+ stackSize: 0
+ offsetAdjustment: 0
+ maxAlignment: 0
+ adjustsStack: false
+ hasCalls: false
+ stackProtector: ''
+ maxCallFrameSize: 4294967295
+ cvBytesOfCalleeSavedRegisters: 0
+ hasOpaqueSPAdjustment: false
+ hasVAStart: false
+ hasMustTailInVarArgFunc: false
+ localFrameSize: 0
+ savePoint: ''
+ restorePoint: ''
+fixedStack: []
+stack: []
+constants: []
+machineFunctionInfo: {}
+body: |
+ bb.0.entry:
+ liveins: $rdi, $rsi
+
+ DBG_VALUE $rdi, $noreg, !21, !DIExpression(), debug-location !25
+ DBG_VALUE $rsi, $noreg, !22, !DIExpression(), debug-location !25
+ %1:gr64 = COPY $rsi
+ DBG_VALUE %1, $noreg, !22, !DIExpression(), debug-location !25
+ %0:gr64 = COPY $rdi
+ DBG_VALUE %0, $noreg, !21, !DIExpression(), debug-location !25
+ DBG_VALUE %0, $noreg, !23, !DIExpression(), debug-location !25
+ MOV8mi %0, 1, $noreg, 0, $noreg, 0, debug-location !27 :: (store 1 into %ir.0)
+ CFI_INSTRUCTION offset $r13, -123
+ DBG_VALUE %0, $noreg, !21, !DIExpression(), debug-location !25
+ DBG_VALUE %0, $noreg, !23, !DIExpression(), debug-location !25
+ DBG_VALUE %0, $noreg, !21, !DIExpression(), debug-location !25
+ DBG_VALUE %0, $noreg, !23, !DIExpression(), debug-location !25
+ DBG_VALUE %0, $noreg, !21, !DIExpression(), debug-location !25
+ DBG_VALUE %0, $noreg, !23, !DIExpression(), debug-location !25
+ DBG_VALUE %0, $noreg, !21, !DIExpression(), debug-location !25
+ DBG_VALUE %0, $noreg, !23, !DIExpression(), debug-location !25
+ DBG_VALUE %0, $noreg, !21, !DIExpression(), debug-location !25
+ DBG_VALUE %0, $noreg, !23, !DIExpression(), debug-location !25
+ DBG_VALUE %0, $noreg, !21, !DIExpression(), debug-location !25
+ DBG_VALUE %0, $noreg, !23, !DIExpression(), debug-location !25
+ DBG_VALUE %0, $noreg, !21, !DIExpression(), debug-location !25
+ DBG_VALUE %0, $noreg, !23, !DIExpression(), debug-location !25
+ DBG_VALUE %0, $noreg, !21, !DIExpression(), debug-location !25
+ DBG_VALUE %0, $noreg, !23, !DIExpression(), debug-location !25
+ DBG_VALUE %0, $noreg, !21, !DIExpression(), debug-location !25
+ DBG_VALUE %0, $noreg, !23, !DIExpression(), debug-location !25
+ %2:vr128 = MOVAPSrm %0, 1, $noreg, 0, $noreg, debug-location !28 :: (load 16 from %ir.p1)
+ DBG_VALUE %2, $noreg, !24, !DIExpression(), debug-location !25
+ MOVAPSmr %1, 1, $noreg, 0, $noreg, killed %2, debug-location !29 :: (store 16 into %ir.p2)
+ RET 0, debug-location !30
+
+ ; CHECK-LABEL: name: debug
+ ; CHECK: %1:gr64 = COPY
+ ; CHECK: %0:gr64 = COPY
+ ; CHECK: MOV8mi
+ ; CHECK: %3:gr8 = MOV8rm
+ ; CHECK: MOV8mr
+ ; CHECK: %4:gr64 = MOV64rm
+ ; CHECK: MOV64mr
+ ; CHECK: %5:gr32 = MOV32rm
+ ; CHECK: MOV32mr
+ ; CHECK: %6:gr16 = MOV16rm
+ ; CHECK: MOV16mr
+ ; CHECK: %7:gr8 = MOV8rm
+ ; CHECK: MOV8mr
+ ; CHECK: RET 0
+...
Added: llvm/trunk/test/CodeGen/X86/avoid-sfb-g-no-change3.mir
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/avoid-sfb-g-no-change3.mir?rev=364829&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/X86/avoid-sfb-g-no-change3.mir (added)
+++ llvm/trunk/test/CodeGen/X86/avoid-sfb-g-no-change3.mir Mon Jul 1 11:28:21 2019
@@ -0,0 +1,223 @@
+# RUN: llc %s -run-pass x86-avoid-SFB -mtriple=x86_64-unknown-linux-gnu -o - | FileCheck %s
+#
+# This was generated from:
+#
+# using alpha = float __attribute__((ext_vector_type(4)));
+#
+# void bravo(alpha * __restrict__ p1, alpha * __restrict__ p2) {
+# char *p3 = (char *)p1;
+# if (p1) {
+# *p3 = 0;
+# alpha t = *p1;
+# *p2 = t;
+# }
+# }
+#
+# Using the command line:
+# clang -g -c 1.cpp -O2 -S -emit-llvm -fno-strict-aliasing --target=x86_64-unknown-unknown -o test.ll
+# llc -stop-before=x86-avoid-SFB test.ll -o before.mir
+#
+# The IR has been modified to include a number of debug/meta instructions between the initial store and load.
+# If the code treats debug/meta instructions as normal instructions, the separation between the store and load
+# will be too great to enable the optimization.
+
+--- |
+ ; ModuleID = 'test.ll'
+ source_filename = "1.cpp"
+ target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+ target triple = "x86_64-unknown-unknown"
+
+ ; Function Attrs: norecurse nounwind uwtable
+ define dso_local void @debug(<4 x float>* noalias %p1, <4 x float>* noalias nocapture %p2) local_unnamed_addr #0 !dbg !10 {
+ entry:
+ call void @llvm.dbg.value(metadata <4 x float>* %p1, metadata !21, metadata !DIExpression()), !dbg !27
+ call void @llvm.dbg.value(metadata <4 x float>* %p2, metadata !22, metadata !DIExpression()), !dbg !27
+ call void @llvm.dbg.value(metadata <4 x float>* %p1, metadata !23, metadata !DIExpression()), !dbg !27
+ %tobool = icmp eq <4 x float>* %p1, null, !dbg !28
+ %0 = bitcast <4 x float>* %p1 to i8*, !dbg !29
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !27
+ store i8 0, i8* %0, align 1, !dbg !30
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !27
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !27
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !27
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !27
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !27
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !27
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !27
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !27
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !27
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !27
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !27
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !27
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !27
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !27
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !27
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !27
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !27
+ call void @llvm.dbg.value(metadata i8* %0, metadata !23, metadata !DIExpression()), !dbg !27
+ br i1 %tobool, label %if.end, label %if.then, !dbg !31
+
+ if.then: ; preds = %entry
+ %1 = load <4 x float>, <4 x float>* %p1, align 16, !dbg !32
+ call void @llvm.dbg.value(metadata <4 x float> %1, metadata !24, metadata !DIExpression()), !dbg !33
+ store <4 x float> %1, <4 x float>* %p2, align 16, !dbg !34
+ br label %if.end, !dbg !35
+
+ if.end: ; preds = %if.then, %entry
+ ret void, !dbg !36
+ }
+
+ ; Function Attrs: nounwind readnone speculatable
+ declare void @llvm.dbg.value(metadata, metadata, metadata) #1
+
+ ; Function Attrs: nounwind
+ declare void @llvm.stackprotector(i8*, i8**) #2
+
+ attributes #0 = { norecurse nounwind uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
+ attributes #1 = { nounwind readnone speculatable }
+ attributes #2 = { nounwind }
+
+ !llvm.dbg.cu = !{!0}
+ !llvm.module.flags = !{!6, !7, !8}
+ !llvm.ident = !{!9}
+
+ !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 9.0.0 (https://github.com/llvm/llvm-project.git 1a0312ca0b20d16edb859065bbace75f6701c92e)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, nameTableKind: None)
+ !1 = !DIFile(filename: "1.cpp", directory: "/mnt/c/Users/gbdawsoc/Documents/llvm/bg40969")
+ !2 = !{}
+ !3 = !{!4}
+ !4 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !5, size: 64)
+ !5 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
+ !6 = !{i32 2, !"Dwarf Version", i32 4}
+ !7 = !{i32 2, !"Debug Info Version", i32 3}
+ !8 = !{i32 1, !"wchar_size", i32 4}
+ !9 = !{!"clang version 9.0.0 (https://github.com/llvm/llvm-project.git 1a0312ca0b20d16edb859065bbace75f6701c92e)"}
+ !10 = distinct !DISubprogram(name: "bravo", linkageName: "debug", scope: !1, file: !1, line: 4, type: !11, scopeLine: 4, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !20)
+ !11 = !DISubroutineType(types: !12)
+ !12 = !{null, !13, !13}
+ !13 = !DIDerivedType(tag: DW_TAG_restrict_type, baseType: !14)
+ !14 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !15, size: 64)
+ !15 = !DIDerivedType(tag: DW_TAG_typedef, name: "alpha", file: !1, line: 2, baseType: !16)
+ !16 = !DICompositeType(tag: DW_TAG_array_type, baseType: !17, size: 128, flags: DIFlagVector, elements: !18)
+ !17 = !DIBasicType(name: "float", size: 32, encoding: DW_ATE_float)
+ !18 = !{!19}
+ !19 = !DISubrange(count: 4)
+ !20 = !{!21, !22, !23, !24}
+ !21 = !DILocalVariable(name: "p1", arg: 1, scope: !10, file: !1, line: 4, type: !13)
+ !22 = !DILocalVariable(name: "p2", arg: 2, scope: !10, file: !1, line: 4, type: !13)
+ !23 = !DILocalVariable(name: "p3", scope: !10, file: !1, line: 5, type: !4)
+ !24 = !DILocalVariable(name: "t", scope: !25, file: !1, line: 8, type: !15)
+ !25 = distinct !DILexicalBlock(scope: !26, file: !1, line: 6, column: 11)
+ !26 = distinct !DILexicalBlock(scope: !10, file: !1, line: 6, column: 7)
+ !27 = !DILocation(line: 0, scope: !10)
+ !28 = !DILocation(line: 6, column: 7, scope: !26)
+ !29 = !DILocation(line: 5, column: 14, scope: !10)
+ !30 = !DILocation(line: 7, column: 9, scope: !25)
+ !31 = !DILocation(line: 6, column: 7, scope: !10)
+ !32 = !DILocation(line: 8, column: 15, scope: !25)
+ !33 = !DILocation(line: 0, scope: !25)
+ !34 = !DILocation(line: 9, column: 9, scope: !25)
+ !35 = !DILocation(line: 10, column: 3, scope: !25)
+ !36 = !DILocation(line: 11, column: 1, scope: !10)
+
+...
+---
+name: debug
+alignment: 4
+exposesReturnsTwice: false
+legalized: false
+regBankSelected: false
+selected: false
+failedISel: false
+tracksRegLiveness: true
+hasWinCFI: false
+registers:
+ - { id: 0, class: gr64, preferred-register: '' }
+ - { id: 1, class: gr64, preferred-register: '' }
+ - { id: 2, class: vr128, preferred-register: '' }
+liveins:
+ - { reg: '$rdi', virtual-reg: '%0' }
+ - { reg: '$rsi', virtual-reg: '%1' }
+frameInfo:
+ isFrameAddressTaken: false
+ isReturnAddressTaken: false
+ hasStackMap: false
+ hasPatchPoint: false
+ stackSize: 0
+ offsetAdjustment: 0
+ maxAlignment: 0
+ adjustsStack: false
+ hasCalls: false
+ stackProtector: ''
+ maxCallFrameSize: 4294967295
+ cvBytesOfCalleeSavedRegisters: 0
+ hasOpaqueSPAdjustment: false
+ hasVAStart: false
+ hasMustTailInVarArgFunc: false
+ localFrameSize: 0
+ savePoint: ''
+ restorePoint: ''
+fixedStack: []
+stack: []
+constants: []
+machineFunctionInfo: {}
+body: |
+ bb.0.entry:
+ successors: %bb.2(0x30000000), %bb.1(0x50000000)
+ liveins: $rdi, $rsi
+
+ DBG_VALUE $rdi, $noreg, !21, !DIExpression(), debug-location !27
+ DBG_VALUE $rsi, $noreg, !22, !DIExpression(), debug-location !27
+ DBG_VALUE $rdi, $noreg, !23, !DIExpression(), debug-location !27
+ %1:gr64 = COPY $rsi
+ DBG_VALUE %1, $noreg, !22, !DIExpression(), debug-location !27
+ %0:gr64 = COPY $rdi
+ DBG_VALUE %0, $noreg, !21, !DIExpression(), debug-location !27
+ DBG_VALUE %0, $noreg, !23, !DIExpression(), debug-location !27
+ TEST64rr %0, %0, implicit-def $eflags, debug-location !28
+ DBG_VALUE %0, $noreg, !23, !DIExpression(), debug-location !27
+ MOV8mi %0, 1, $noreg, 0, $noreg, 0, debug-location !30 :: (store 1 into %ir.0)
+ CFI_INSTRUCTION offset $r13, -123
+ DBG_VALUE %0, $noreg, !21, !DIExpression(), debug-location !27
+ DBG_VALUE %0, $noreg, !23, !DIExpression(), debug-location !27
+ DBG_VALUE %0, $noreg, !21, !DIExpression(), debug-location !27
+ DBG_VALUE %0, $noreg, !23, !DIExpression(), debug-location !27
+ DBG_VALUE %0, $noreg, !21, !DIExpression(), debug-location !27
+ DBG_VALUE %0, $noreg, !23, !DIExpression(), debug-location !27
+ DBG_VALUE %0, $noreg, !21, !DIExpression(), debug-location !27
+ DBG_VALUE %0, $noreg, !23, !DIExpression(), debug-location !27
+ DBG_VALUE %0, $noreg, !21, !DIExpression(), debug-location !27
+ DBG_VALUE %0, $noreg, !23, !DIExpression(), debug-location !27
+ DBG_VALUE %0, $noreg, !21, !DIExpression(), debug-location !27
+ DBG_VALUE %0, $noreg, !23, !DIExpression(), debug-location !27
+ DBG_VALUE %0, $noreg, !21, !DIExpression(), debug-location !27
+ DBG_VALUE %0, $noreg, !23, !DIExpression(), debug-location !27
+ DBG_VALUE %0, $noreg, !21, !DIExpression(), debug-location !27
+ DBG_VALUE %0, $noreg, !23, !DIExpression(), debug-location !27
+ DBG_VALUE %0, $noreg, !21, !DIExpression(), debug-location !27
+ DBG_VALUE %0, $noreg, !23, !DIExpression(), debug-location !27
+ JCC_1 %bb.2, 4, implicit $eflags, debug-location !31
+ JMP_1 %bb.1, debug-location !31
+
+ bb.1.if.then:
+ successors: %bb.2(0x80000000)
+
+ %2:vr128 = MOVAPSrm %0, 1, $noreg, 0, $noreg, debug-location !32 :: (load 16 from %ir.p1)
+ DBG_VALUE %2, $noreg, !24, !DIExpression(), debug-location !33
+ MOVAPSmr %1, 1, $noreg, 0, $noreg, killed %2, debug-location !34 :: (store 16 into %ir.p2)
+
+ bb.2.if.end:
+ RET 0, debug-location !36
+
+ ; CHECK-LABEL: name: debug
+ ; CHECK: %3:gr8 = MOV8rm
+ ; CHECK: MOV8mr
+ ; CHECK: %4:gr64 = MOV64rm
+ ; CHECK: MOV64mr
+ ; CHECK: %5:gr32 = MOV32rm
+ ; CHECK: MOV32mr
+ ; CHECK: %6:gr16 = MOV16rm
+ ; CHECK: MOV16mr
+ ; CHECK: %7:gr8 = MOV8rm
+ ; CHECK: MOV8mr
+ ; CHECK: RET 0
+...
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