test/DebugInfo/MIR/Mips/dbg-call-site-delay-slot-interpretation.mir - llvm-project/llvm - Git at Google

 ## Test mips32:
 # RUN: llc -emit-call-site-info -start-after=machineverifier -filetype=obj -mtriple=mips-linux-gnu %s -o -| llvm-dwarfdump -| FileCheck %s
 ## Test mipsel:
 # RUN: llc -emit-call-site-info -start-after=machineverifier -filetype=obj -mtriple=mipsel-linux-gnu %s -o -| llvm-dwarfdump -| FileCheck %s

 ## Built from source:
 ## extern int __attribute__((noinline)) sum(int a, int b);
 ## void __attribute__((noinline)) set(int *adr, int val) {
 ##   val++;
 ##   *adr = val + sum(val, val);
 ## }
 ## Using command:
 ## clang -g -O2 -target mips-linux-gnu m.c -c -mllvm -stop-before=machineverifier
 ## Check that call site interpretation analysis can interpret calls with delay slot and
 ## parameters set outside and inside of the call delay slot.

 ## Test mips32:
 # CHECK:        DW_TAG_GNU_call_site
 # CHECK-NEXT:     DW_AT_abstract_origin {{.*}} "sum"
 # CHECK-NEXT:     DW_AT_low_pc
 # CHECK-EMPTY:
 ## Parameter forwarding register A1_64 is set in call delay slot.
 # CHECK-NEXT:     DW_TAG_GNU_call_site_parameter
 # CHECK-NEXT:       DW_AT_location      (DW_OP_reg5 A1_64)
 # CHECK-NEXT:       DW_AT_GNU_call_site_value   (DW_OP_breg17 S1_64+0)
 # CHECK-EMPTY:
 # CHECK-NEXT:     DW_TAG_GNU_call_site_parameter
 # CHECK-NEXT:       DW_AT_location      (DW_OP_reg4 A0_64)
 # CHECK-NEXT:       DW_AT_GNU_call_site_value   (DW_OP_breg17 S1_64+0)

 --- |
   ; ModuleID = 'm.ll'
   source_filename = "m.c"
   target datalayout = "E-m:m-p:32:32-i8:8:32-i16:16:32-i64:64-n32-S64"
   target triple = "mips-unknown-linux-gnu"
   ; Function Attrs: noinline nounwind
   define dso_local void @set(i32* nocapture %adr, i32 signext %val) local_unnamed_addr !dbg !12 {
   entry:
     call void @llvm.dbg.value(metadata i32* %adr, metadata !17, metadata !DIExpression()), !dbg !19
     call void @llvm.dbg.value(metadata i32 %val, metadata !18, metadata !DIExpression()), !dbg !19
     %inc = add nsw i32 %val, 1, !dbg !19
     call void @llvm.dbg.value(metadata i32 %inc, metadata !18, metadata !DIExpression()), !dbg !19
     %call = tail call i32 @sum(i32 signext %inc, i32 signext %inc), !dbg !19
     %add = add nsw i32 %call, %inc, !dbg !19
     store i32 %add, i32* %adr, align 4, !dbg !19
     ret void
   }
   declare !dbg !4 dso_local i32 @sum(i32 signext, i32 signext) local_unnamed_addr
   ; Function Attrs: nounwind readnone speculatable willreturn
   declare void @llvm.dbg.value(metadata, metadata, metadata)

   !llvm.dbg.cu = !{!0}
   !llvm.module.flags = !{!8, !9, !10}
   !llvm.ident = !{!11}

   !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 11.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, splitDebugInlining: false, nameTableKind: None)
   !1 = !DIFile(filename: "m.c", directory: "/dir")
   !2 = !{}
   !3 = !{!4}
   !4 = !DISubprogram(name: "sum", scope: !1, file: !1, line: 1, type: !5, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
   !5 = !DISubroutineType(types: !6)
   !6 = !{!7, !7, !7}
   !7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
   !8 = !{i32 7, !"Dwarf Version", i32 4}
   !9 = !{i32 2, !"Debug Info Version", i32 3}
   !10 = !{i32 1, !"wchar_size", i32 4}
   !11 = !{!"clang version 11.0.0"}
   !12 = distinct !DISubprogram(name: "set", scope: !1, file: !1, line: 2, type: !13, scopeLine: 2, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !16)
   !13 = !DISubroutineType(types: !14)
   !14 = !{null, !15, !7}
   !15 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !7, size: 32)
   !16 = !{!17, !18}
   !17 = !DILocalVariable(name: "adr", arg: 1, scope: !12, file: !1, line: 2, type: !15)
   !18 = !DILocalVariable(name: "val", arg: 2, scope: !12, file: !1, line: 2, type: !7)
   !19 = !DILocation(line: 0, scope: !12)

 ...
 ---
 name:            set
 alignment:       4
 stack:
   - { id: 0, name: '', type: spill-slot, offset: -4, size: 4, alignment: 4,
       stack-id: default, callee-saved-register: '$ra', callee-saved-restored: true,
       debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
   - { id: 1, name: '', type: spill-slot, offset: -8, size: 4, alignment: 4,
       stack-id: default, callee-saved-register: '$s1', callee-saved-restored: true,
       debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
   - { id: 2, name: '', type: spill-slot, offset: -12, size: 4, alignment: 4,
       stack-id: default, callee-saved-register: '$s0', callee-saved-restored: true,
       debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
 callSites:
   - { bb: 0, offset: 16, fwdArgRegs:
       - { arg: 0, reg: '$a0' }
       - { arg: 1, reg: '$a1' } }
 body:             |
   bb.0.entry:
     DBG_VALUE $a0, $noreg, !17, !DIExpression(), debug-location !19
     DBG_VALUE $a1, $noreg, !18, !DIExpression(), debug-location !19
     DBG_VALUE $a1, $noreg, !18, !DIExpression(), debug-location !19
     $sp = ADDiu $sp, -32
     CFI_INSTRUCTION def_cfa_offset 32
     SW killed $ra, $sp, 28 :: (store 4 into %stack.0)
     SW killed $s1, $sp, 24 :: (store 4 into %stack.1)
     SW killed $s0, $sp, 20 :: (store 4 into %stack.2)
     CFI_INSTRUCTION offset $ra_64, -4
     CFI_INSTRUCTION offset $s1_64, -8
     CFI_INSTRUCTION offset $s0_64, -12
     $s0 = OR $a0, $zero
     DBG_VALUE $s0, $noreg, !17, !DIExpression(), debug-location !19
     renamable $s1 = nsw ADDiu killed renamable $a1, 1, debug-location !19
     DBG_VALUE $s1, $noreg, !18, !DIExpression(), debug-location !19
     $a0 = OR $s1, $zero, debug-location !19
     JAL @sum, csr_o32, implicit-def dead $ra, implicit $a0, implicit $a1, implicit-def $sp, implicit-def $v0, debug-location !19 {
       $a1 = OR $s1, $zero, debug-location !19
     }
     renamable $at = nsw ADDu killed renamable $v0, killed renamable $s1, debug-location !19
     SW killed renamable $at, killed renamable $s0, 0, debug-location !19 :: (store 4 into %ir.adr)
     $s0 = LW $sp, 20
     DBG_VALUE $a0, $noreg, !17, !DIExpression(DW_OP_LLVM_entry_value, 1), debug-location !19
     $s1 = LW $sp, 24
     $ra = LW $sp, 28
     PseudoReturn undef $ra {
       $sp = ADDiu $sp, 32
     }

 ...
	## Test mips32:
	# RUN: llc -emit-call-site-info -start-after=machineverifier -filetype=obj -mtriple=mips-linux-gnu %s -o -\| llvm-dwarfdump -\| FileCheck %s
	## Test mipsel:
	# RUN: llc -emit-call-site-info -start-after=machineverifier -filetype=obj -mtriple=mipsel-linux-gnu %s -o -\| llvm-dwarfdump -\| FileCheck %s

	## Built from source:
	## extern int __attribute__((noinline)) sum(int a, int b);
	## void __attribute__((noinline)) set(int *adr, int val) {
	## val++;
	## *adr = val + sum(val, val);
	## }
	## Using command:
	## clang -g -O2 -target mips-linux-gnu m.c -c -mllvm -stop-before=machineverifier
	## Check that call site interpretation analysis can interpret calls with delay slot and
	## parameters set outside and inside of the call delay slot.

	## Test mips32:
	# CHECK: DW_TAG_GNU_call_site
	# CHECK-NEXT: DW_AT_abstract_origin {{.*}} "sum"
	# CHECK-NEXT: DW_AT_low_pc
	# CHECK-EMPTY:
	## Parameter forwarding register A1_64 is set in call delay slot.
	# CHECK-NEXT: DW_TAG_GNU_call_site_parameter
	# CHECK-NEXT: DW_AT_location (DW_OP_reg5 A1_64)
	# CHECK-NEXT: DW_AT_GNU_call_site_value (DW_OP_breg17 S1_64+0)
	# CHECK-EMPTY:
	# CHECK-NEXT: DW_TAG_GNU_call_site_parameter
	# CHECK-NEXT: DW_AT_location (DW_OP_reg4 A0_64)
	# CHECK-NEXT: DW_AT_GNU_call_site_value (DW_OP_breg17 S1_64+0)

	--- \|
	; ModuleID = 'm.ll'
	source_filename = "m.c"
	target datalayout = "E-m:m-p:32:32-i8:8:32-i16:16:32-i64:64-n32-S64"
	target triple = "mips-unknown-linux-gnu"
	; Function Attrs: noinline nounwind
	define dso_local void @set(i32* nocapture %adr, i32 signext %val) local_unnamed_addr !dbg !12 {
	entry:
	call void @llvm.dbg.value(metadata i32* %adr, metadata !17, metadata !DIExpression()), !dbg !19
	call void @llvm.dbg.value(metadata i32 %val, metadata !18, metadata !DIExpression()), !dbg !19
	%inc = add nsw i32 %val, 1, !dbg !19
	call void @llvm.dbg.value(metadata i32 %inc, metadata !18, metadata !DIExpression()), !dbg !19
	%call = tail call i32 @sum(i32 signext %inc, i32 signext %inc), !dbg !19
	%add = add nsw i32 %call, %inc, !dbg !19
	store i32 %add, i32* %adr, align 4, !dbg !19
	ret void
	}
	declare !dbg !4 dso_local i32 @sum(i32 signext, i32 signext) local_unnamed_addr
	; Function Attrs: nounwind readnone speculatable willreturn
	declare void @llvm.dbg.value(metadata, metadata, metadata)

	!llvm.dbg.cu = !{!0}
	!llvm.module.flags = !{!8, !9, !10}
	!llvm.ident = !{!11}

	!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 11.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, splitDebugInlining: false, nameTableKind: None)
	!1 = !DIFile(filename: "m.c", directory: "/dir")
	!2 = !{}
	!3 = !{!4}
	!4 = !DISubprogram(name: "sum", scope: !1, file: !1, line: 1, type: !5, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
	!5 = !DISubroutineType(types: !6)
	!6 = !{!7, !7, !7}
	!7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
	!8 = !{i32 7, !"Dwarf Version", i32 4}
	!9 = !{i32 2, !"Debug Info Version", i32 3}
	!10 = !{i32 1, !"wchar_size", i32 4}
	!11 = !{!"clang version 11.0.0"}
	!12 = distinct !DISubprogram(name: "set", scope: !1, file: !1, line: 2, type: !13, scopeLine: 2, flags: DIFlagPrototyped \| DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition \| DISPFlagOptimized, unit: !0, retainedNodes: !16)
	!13 = !DISubroutineType(types: !14)
	!14 = !{null, !15, !7}
	!15 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !7, size: 32)
	!16 = !{!17, !18}
	!17 = !DILocalVariable(name: "adr", arg: 1, scope: !12, file: !1, line: 2, type: !15)
	!18 = !DILocalVariable(name: "val", arg: 2, scope: !12, file: !1, line: 2, type: !7)
	!19 = !DILocation(line: 0, scope: !12)

	...
	---
	name: set
	alignment: 4
	stack:
	- { id: 0, name: '', type: spill-slot, offset: -4, size: 4, alignment: 4,
	stack-id: default, callee-saved-register: '$ra', callee-saved-restored: true,
	debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
	- { id: 1, name: '', type: spill-slot, offset: -8, size: 4, alignment: 4,
	stack-id: default, callee-saved-register: '$s1', callee-saved-restored: true,
	debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
	- { id: 2, name: '', type: spill-slot, offset: -12, size: 4, alignment: 4,
	stack-id: default, callee-saved-register: '$s0', callee-saved-restored: true,
	debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
	callSites:
	- { bb: 0, offset: 16, fwdArgRegs:
	- { arg: 0, reg: '$a0' }
	- { arg: 1, reg: '$a1' } }
	body: \|
	bb.0.entry:
	DBG_VALUE $a0, $noreg, !17, !DIExpression(), debug-location !19
	DBG_VALUE $a1, $noreg, !18, !DIExpression(), debug-location !19
	DBG_VALUE $a1, $noreg, !18, !DIExpression(), debug-location !19
	$sp = ADDiu $sp, -32
	CFI_INSTRUCTION def_cfa_offset 32
	SW killed $ra, $sp, 28 :: (store 4 into %stack.0)
	SW killed $s1, $sp, 24 :: (store 4 into %stack.1)
	SW killed $s0, $sp, 20 :: (store 4 into %stack.2)
	CFI_INSTRUCTION offset $ra_64, -4
	CFI_INSTRUCTION offset $s1_64, -8
	CFI_INSTRUCTION offset $s0_64, -12
	$s0 = OR $a0, $zero
	DBG_VALUE $s0, $noreg, !17, !DIExpression(), debug-location !19
	renamable $s1 = nsw ADDiu killed renamable $a1, 1, debug-location !19
	DBG_VALUE $s1, $noreg, !18, !DIExpression(), debug-location !19
	$a0 = OR $s1, $zero, debug-location !19
	JAL @sum, csr_o32, implicit-def dead $ra, implicit $a0, implicit $a1, implicit-def $sp, implicit-def $v0, debug-location !19 {
	$a1 = OR $s1, $zero, debug-location !19
	}
	renamable $at = nsw ADDu killed renamable $v0, killed renamable $s1, debug-location !19
	SW killed renamable $at, killed renamable $s0, 0, debug-location !19 :: (store 4 into %ir.adr)
	$s0 = LW $sp, 20
	DBG_VALUE $a0, $noreg, !17, !DIExpression(DW_OP_LLVM_entry_value, 1), debug-location !19
	$s1 = LW $sp, 24
	$ra = LW $sp, 28
	PseudoReturn undef $ra {
	$sp = ADDiu $sp, 32
	}

	...