test/DebugInfo/MIR/X86/call-site-gnu-vs-dwarf5-attrs.mir - llvm-project/llvm - Git at Google

 ## Test the call site encoding in DWARF5 vs GNU extensions.

 ## === DWARF4, tune for gdb ===
 # RUN: llc -emit-call-site-info -dwarf-version 4 -debugger-tune=gdb -filetype=obj \
 # RUN:     -mtriple=x86_64-unknown-unknown -start-after=machineverifier -o - %s  \
 # RUN:     | llvm-dwarfdump - | FileCheck %s -check-prefixes=CHECK-GNU -implicit-check-not=DW_AT_call

 # === DWARF5, tune for gdb ===
 # RUN: llc -dwarf-version 5 -debugger-tune=gdb -emit-call-site-info -filetype=obj \
 # RUN:     -mtriple=x86_64-unknown-unknown -start-after=machineverifier -o - %s  \
 # RUN:     | llvm-dwarfdump - | FileCheck %s -check-prefixes=CHECK-DWARF5 -implicit-check-not=DW_AT_call

 ## === DWARF4, tune for lldb ===
 # RUN: llc -dwarf-version 4 -debugger-tune=lldb -emit-call-site-info -filetype=obj \
 # RUN:     -mtriple=x86_64-unknown-unknown -start-after=machineverifier -o - %s   \
 # RUN:     | llvm-dwarfdump - | FileCheck %s -check-prefixes=CHECK-DWARF5 -implicit-check-not=DW_AT_call

 ## === DWARF5, tune for lldb ===
 # RUN: llc -dwarf-version 5 -debugger-tune=lldb -emit-call-site-info -filetype=obj \
 # RUN:     -mtriple=x86_64-unknown-unknown -start-after=machineverifier -o - %s   \
 # RUN:     | llvm-dwarfdump - | FileCheck %s -check-prefixes=CHECK-DWARF5 -implicit-check-not=DW_AT_call

 ## === DWARF4, tune for sce ===
 # RUN: llc -emit-call-site-info -dwarf-version 4 -filetype=obj -debugger-tune=sce \
 # RUN:     -debug-entry-values -mtriple=x86_64-unknown-unknown \
 # RUN:     -start-after=machineverifier -o - %s | llvm-dwarfdump - | FileCheck %s -check-prefixes=CHECK-GNU

 ## === DWARF5, tune for sce ===
 # RUN: llc -emit-call-site-info -dwarf-version 5 -filetype=obj -debugger-tune=sce \
 # RUN:     -debug-entry-values -mtriple=x86_64-unknown-unknown \
 # RUN:     -start-after=machineverifier -o - %s | llvm-dwarfdump - | FileCheck %s -check-prefixes=CHECK-DWARF5

 ## This is based on the following reproducer:
 ##
 ## extern void fn();
 ## extern void fn2(int x);
 ## extern int fn3();
 ##
 ## int fn1(int (*fn4) ()) {
 ##   fn();
 ##   fn2(5);
 ##
 ##   int x = (*fn4)();
 ##   if (!x)
 ##     return fn3();
 ##   else
 ##     return -1;
 ## }

 ## Check GNU extensions:

 # CHECK-GNU:        DW_TAG_subprogram
 # CHECK-GNU:          DW_AT_GNU_all_call_sites    (true)
 # CHECK-GNU:        DW_TAG_GNU_call_site
 # CHECK-GNU-NEXT:     DW_AT_abstract_origin
 # CHECK-GNU-NEXT:     DW_AT_low_pc
 # CHECK-GNU:          DW_TAG_GNU_call_site_parameter
 # CHECK-GNU-NEXT:       DW_AT_location
 # CHECK-GNU-NEXT:       DW_AT_GNU_call_site_value
 # CHECK-GNU:        DW_TAG_GNU_call_site
 # CHECK-GNU-NEXT:       DW_AT_GNU_call_site_target
 # CHECK-GNU-NEXT:       DW_AT_low_pc
 # CHECK-GNU:        DW_TAG_GNU_call_site
 # CHECK-GNU-NEXT:     DW_AT_abstract_origin
 # CHECK-GNU-NEXT:     DW_AT_GNU_tail_call
 # CHECK-GNU-NEXT:     DW_AT_low_pc

 ## Check DWARF 5:

 # CHECK-DWARF5:        DW_TAG_subprogram
 # CHECK-DWARF5:          DW_AT_call_all_calls    (true)
 # CHECK-DWARF5:        DW_TAG_call_site
 # CHECK-DWARF5-NEXT:     DW_AT_call_origin
 # CHECK-DWARF5-NEXT:     DW_AT_call_return_pc
 # CHECK-DWARF5:        DW_TAG_call_site
 # CHECK-DWARF5-NEXT:     DW_AT_call_origin
 # CHECK-DWARF5-NEXT:     DW_AT_call_return_pc
 # CHECK-DWARF5:          DW_TAG_call_site_parameter
 # CHECK-DWARF5-NEXT:       DW_AT_location
 # CHECK-DWARF5-NEXT:       DW_AT_call_value
 # CHECK-DWARF5:        DW_TAG_call_site
 # CHECK-DWARF5-NEXT:     DW_AT_call_target
 # CHECK-DWARF5-NEXT:     DW_AT_call_return_pc
 # CHECK-DWARF5:        DW_TAG_call_site
 # CHECK-DWARF5-NEXT:     DW_AT_call_origin
 # CHECK-DWARF5-NEXT:     DW_AT_call_tail_call
 # CHECK-DWARF5-NEXT:     DW_AT_call_pc

 --- |
   ; ModuleID = 'call-site-attrs.c'
   source_filename = "call-site-attrs.c"
   target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
   target triple = "x86_64-unknown-linux-gnu"
   ; Function Attrs: nounwind uwtable
   define dso_local i32 @fn1(i32 (...)* nocapture %fn4) local_unnamed_addr !dbg !18 {
   entry:
     call void @llvm.dbg.value(metadata i32 (...)* %fn4, metadata !23, metadata !DIExpression()), !dbg !25
     tail call void (...) @fn(), !dbg !26
     tail call void @fn2(i32 5), !dbg !27
     %call = tail call i32 (...) %fn4(), !dbg !28
     call void @llvm.dbg.value(metadata i32 %call, metadata !24, metadata !DIExpression()), !dbg !25
     %tobool = icmp eq i32 %call, 0, !dbg !29
     br i1 %tobool, label %if.then, label %cleanup, !dbg !31

   if.then:                                          ; preds = %entry
     %call1 = tail call i32 (...) @fn3(), !dbg !32
     ret i32 %call1, !dbg !33

   cleanup:                                          ; preds = %entry
     ret i32 -1, !dbg !33
   }
   declare !dbg !4 dso_local void @fn(...) local_unnamed_addr
   declare !dbg !7 dso_local void @fn2(i32) local_unnamed_addr
   declare !dbg !11 dso_local i32 @fn3(...) local_unnamed_addr
   ; Function Attrs: nounwind readnone speculatable willreturn
   declare void @llvm.dbg.value(metadata, metadata, metadata)

   !llvm.dbg.cu = !{!0}
   !llvm.module.flags = !{!14, !15, !16}
   !llvm.ident = !{!17}

   !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: "call-site-attrs.c", directory: "/")
   !2 = !{}
   !3 = !{!4, !7, !11}
   !4 = !DISubprogram(name: "fn", scope: !1, file: !1, line: 1, type: !5, spFlags: DISPFlagOptimized, retainedNodes: !2)
   !5 = !DISubroutineType(types: !6)
   !6 = !{null, null}
   !7 = !DISubprogram(name: "fn2", scope: !1, file: !1, line: 2, type: !8, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
   !8 = !DISubroutineType(types: !9)
   !9 = !{null, !10}
   !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
   !11 = !DISubprogram(name: "fn3", scope: !1, file: !1, line: 3, type: !12, spFlags: DISPFlagOptimized, retainedNodes: !2)
   !12 = !DISubroutineType(types: !13)
   !13 = !{!10, null}
   !14 = !{i32 7, !"Dwarf Version", i32 4}
   !15 = !{i32 2, !"Debug Info Version", i32 3}
   !16 = !{i32 1, !"wchar_size", i32 4}
   !17 = !{!"clang version 11.0.0"}
   !18 = distinct !DISubprogram(name: "fn1", scope: !1, file: !1, line: 5, type: !19, scopeLine: 5, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !22)
   !19 = !DISubroutineType(types: !20)
   !20 = !{!10, !21}
   !21 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !12, size: 64)
   !22 = !{!23, !24}
   !23 = !DILocalVariable(name: "fn4", arg: 1, scope: !18, file: !1, line: 5, type: !21)
   !24 = !DILocalVariable(name: "x", scope: !18, file: !1, line: 9, type: !10)
   !25 = !DILocation(line: 0, scope: !18)
   !26 = !DILocation(line: 6, column: 3, scope: !18)
   !27 = !DILocation(line: 7, column: 3, scope: !18)
   !28 = !DILocation(line: 9, column: 11, scope: !18)
   !29 = !DILocation(line: 10, column: 8, scope: !30)
   !30 = distinct !DILexicalBlock(scope: !18, file: !1, line: 10, column: 7)
   !31 = !DILocation(line: 10, column: 7, scope: !18)
   !32 = !DILocation(line: 11, column: 12, scope: !30)
   !33 = !DILocation(line: 14, column: 1, scope: !18)

 ...
 ---
 name:            fn1
 callSites:
   - { bb: 0, offset: 7, fwdArgRegs: [] }
   - { bb: 0, offset: 9, fwdArgRegs:
       - { arg: 0, reg: '$edi' } }
   - { bb: 0, offset: 11, fwdArgRegs: [] }
   - { bb: 2, offset: 7, fwdArgRegs: [] }
 body:             |
   bb.0.entry:
     successors: %bb.2(0x30000000), %bb.1(0x50000000)
     liveins: $rdi, $rbx

     DBG_VALUE $rdi, $noreg, !23, !DIExpression(), debug-location !25
     frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp
     CFI_INSTRUCTION def_cfa_offset 16
     CFI_INSTRUCTION offset $rbx, -16
     $rbx = MOV64rr $rdi
     DBG_VALUE $rbx, $noreg, !23, !DIExpression(), debug-location !25
     dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !26
     CALL64pcrel32 @fn, csr_64, implicit $rsp, implicit $ssp, implicit $al, implicit-def $rsp, implicit-def $ssp, debug-location !26
     $edi = MOV32ri 5, debug-location !27
     CALL64pcrel32 @fn2, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit-def $rsp, implicit-def $ssp, debug-location !27
     dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !28
     CALL64r killed renamable $rbx, csr_64, implicit $rsp, implicit $ssp, implicit $al, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !28
     DBG_VALUE $eax, $noreg, !24, !DIExpression(), debug-location !25
     TEST32rr killed renamable $eax, renamable $eax, implicit-def $eflags, debug-location !29
     JCC_1 %bb.2, 4, implicit $eflags, debug-location !31

   bb.1.cleanup:
     DBG_VALUE $eax, $noreg, !24, !DIExpression(), debug-location !25
     DBG_VALUE $rbx, $noreg, !23, !DIExpression(), debug-location !25
     $eax = MOV32ri -1, debug-location !33
     $rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !33
     DBG_VALUE $rdi, $noreg, !23, !DIExpression(DW_OP_LLVM_entry_value, 1), debug-location !25
     CFI_INSTRUCTION def_cfa_offset 8, debug-location !33
     RETQ $eax, debug-location !33

   bb.2.if.then:
     CFI_INSTRUCTION def_cfa_offset 16, debug-location !32
     DBG_VALUE $eax, $noreg, !24, !DIExpression(), debug-location !25
     DBG_VALUE $rbx, $noreg, !23, !DIExpression(), debug-location !25
     dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !32
     $rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !32
     DBG_VALUE $rdi, $noreg, !23, !DIExpression(DW_OP_LLVM_entry_value, 1), debug-location !25
     CFI_INSTRUCTION def_cfa_offset 8, debug-location !32
     TAILJMPd64 @fn3, csr_64, implicit $rsp, implicit $ssp, implicit $rsp, implicit $ssp, implicit $al, debug-location !32

 ...
	## Test the call site encoding in DWARF5 vs GNU extensions.

	## === DWARF4, tune for gdb ===
	# RUN: llc -emit-call-site-info -dwarf-version 4 -debugger-tune=gdb -filetype=obj \
	# RUN: -mtriple=x86_64-unknown-unknown -start-after=machineverifier -o - %s \
	# RUN: \| llvm-dwarfdump - \| FileCheck %s -check-prefixes=CHECK-GNU -implicit-check-not=DW_AT_call

	# === DWARF5, tune for gdb ===
	# RUN: llc -dwarf-version 5 -debugger-tune=gdb -emit-call-site-info -filetype=obj \
	# RUN: -mtriple=x86_64-unknown-unknown -start-after=machineverifier -o - %s \
	# RUN: \| llvm-dwarfdump - \| FileCheck %s -check-prefixes=CHECK-DWARF5 -implicit-check-not=DW_AT_call

	## === DWARF4, tune for lldb ===
	# RUN: llc -dwarf-version 4 -debugger-tune=lldb -emit-call-site-info -filetype=obj \
	# RUN: -mtriple=x86_64-unknown-unknown -start-after=machineverifier -o - %s \
	# RUN: \| llvm-dwarfdump - \| FileCheck %s -check-prefixes=CHECK-DWARF5 -implicit-check-not=DW_AT_call

	## === DWARF5, tune for lldb ===
	# RUN: llc -dwarf-version 5 -debugger-tune=lldb -emit-call-site-info -filetype=obj \
	# RUN: -mtriple=x86_64-unknown-unknown -start-after=machineverifier -o - %s \
	# RUN: \| llvm-dwarfdump - \| FileCheck %s -check-prefixes=CHECK-DWARF5 -implicit-check-not=DW_AT_call

	## === DWARF4, tune for sce ===
	# RUN: llc -emit-call-site-info -dwarf-version 4 -filetype=obj -debugger-tune=sce \
	# RUN: -debug-entry-values -mtriple=x86_64-unknown-unknown \
	# RUN: -start-after=machineverifier -o - %s \| llvm-dwarfdump - \| FileCheck %s -check-prefixes=CHECK-GNU

	## === DWARF5, tune for sce ===
	# RUN: llc -emit-call-site-info -dwarf-version 5 -filetype=obj -debugger-tune=sce \
	# RUN: -debug-entry-values -mtriple=x86_64-unknown-unknown \
	# RUN: -start-after=machineverifier -o - %s \| llvm-dwarfdump - \| FileCheck %s -check-prefixes=CHECK-DWARF5

	## This is based on the following reproducer:
	##
	## extern void fn();
	## extern void fn2(int x);
	## extern int fn3();
	##
	## int fn1(int (*fn4) ()) {
	## fn();
	## fn2(5);
	##
	## int x = (*fn4)();
	## if (!x)
	## return fn3();
	## else
	## return -1;
	## }

	## Check GNU extensions:

	# CHECK-GNU: DW_TAG_subprogram
	# CHECK-GNU: DW_AT_GNU_all_call_sites (true)
	# CHECK-GNU: DW_TAG_GNU_call_site
	# CHECK-GNU-NEXT: DW_AT_abstract_origin
	# CHECK-GNU-NEXT: DW_AT_low_pc
	# CHECK-GNU: DW_TAG_GNU_call_site_parameter
	# CHECK-GNU-NEXT: DW_AT_location
	# CHECK-GNU-NEXT: DW_AT_GNU_call_site_value
	# CHECK-GNU: DW_TAG_GNU_call_site
	# CHECK-GNU-NEXT: DW_AT_GNU_call_site_target
	# CHECK-GNU-NEXT: DW_AT_low_pc
	# CHECK-GNU: DW_TAG_GNU_call_site
	# CHECK-GNU-NEXT: DW_AT_abstract_origin
	# CHECK-GNU-NEXT: DW_AT_GNU_tail_call
	# CHECK-GNU-NEXT: DW_AT_low_pc

	## Check DWARF 5:

	# CHECK-DWARF5: DW_TAG_subprogram
	# CHECK-DWARF5: DW_AT_call_all_calls (true)
	# CHECK-DWARF5: DW_TAG_call_site
	# CHECK-DWARF5-NEXT: DW_AT_call_origin
	# CHECK-DWARF5-NEXT: DW_AT_call_return_pc
	# CHECK-DWARF5: DW_TAG_call_site
	# CHECK-DWARF5-NEXT: DW_AT_call_origin
	# CHECK-DWARF5-NEXT: DW_AT_call_return_pc
	# CHECK-DWARF5: DW_TAG_call_site_parameter
	# CHECK-DWARF5-NEXT: DW_AT_location
	# CHECK-DWARF5-NEXT: DW_AT_call_value
	# CHECK-DWARF5: DW_TAG_call_site
	# CHECK-DWARF5-NEXT: DW_AT_call_target
	# CHECK-DWARF5-NEXT: DW_AT_call_return_pc
	# CHECK-DWARF5: DW_TAG_call_site
	# CHECK-DWARF5-NEXT: DW_AT_call_origin
	# CHECK-DWARF5-NEXT: DW_AT_call_tail_call
	# CHECK-DWARF5-NEXT: DW_AT_call_pc

	--- \|
	; ModuleID = 'call-site-attrs.c'
	source_filename = "call-site-attrs.c"
	target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
	target triple = "x86_64-unknown-linux-gnu"
	; Function Attrs: nounwind uwtable
	define dso_local i32 @fn1(i32 (...)* nocapture %fn4) local_unnamed_addr !dbg !18 {
	entry:
	call void @llvm.dbg.value(metadata i32 (...)* %fn4, metadata !23, metadata !DIExpression()), !dbg !25
	tail call void (...) @fn(), !dbg !26
	tail call void @fn2(i32 5), !dbg !27
	%call = tail call i32 (...) %fn4(), !dbg !28
	call void @llvm.dbg.value(metadata i32 %call, metadata !24, metadata !DIExpression()), !dbg !25
	%tobool = icmp eq i32 %call, 0, !dbg !29
	br i1 %tobool, label %if.then, label %cleanup, !dbg !31

	if.then: ; preds = %entry
	%call1 = tail call i32 (...) @fn3(), !dbg !32
	ret i32 %call1, !dbg !33

	cleanup: ; preds = %entry
	ret i32 -1, !dbg !33
	}
	declare !dbg !4 dso_local void @fn(...) local_unnamed_addr
	declare !dbg !7 dso_local void @fn2(i32) local_unnamed_addr
	declare !dbg !11 dso_local i32 @fn3(...) local_unnamed_addr
	; Function Attrs: nounwind readnone speculatable willreturn
	declare void @llvm.dbg.value(metadata, metadata, metadata)

	!llvm.dbg.cu = !{!0}
	!llvm.module.flags = !{!14, !15, !16}
	!llvm.ident = !{!17}

	!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: "call-site-attrs.c", directory: "/")
	!2 = !{}
	!3 = !{!4, !7, !11}
	!4 = !DISubprogram(name: "fn", scope: !1, file: !1, line: 1, type: !5, spFlags: DISPFlagOptimized, retainedNodes: !2)
	!5 = !DISubroutineType(types: !6)
	!6 = !{null, null}
	!7 = !DISubprogram(name: "fn2", scope: !1, file: !1, line: 2, type: !8, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
	!8 = !DISubroutineType(types: !9)
	!9 = !{null, !10}
	!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
	!11 = !DISubprogram(name: "fn3", scope: !1, file: !1, line: 3, type: !12, spFlags: DISPFlagOptimized, retainedNodes: !2)
	!12 = !DISubroutineType(types: !13)
	!13 = !{!10, null}
	!14 = !{i32 7, !"Dwarf Version", i32 4}
	!15 = !{i32 2, !"Debug Info Version", i32 3}
	!16 = !{i32 1, !"wchar_size", i32 4}
	!17 = !{!"clang version 11.0.0"}
	!18 = distinct !DISubprogram(name: "fn1", scope: !1, file: !1, line: 5, type: !19, scopeLine: 5, flags: DIFlagPrototyped \| DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition \| DISPFlagOptimized, unit: !0, retainedNodes: !22)
	!19 = !DISubroutineType(types: !20)
	!20 = !{!10, !21}
	!21 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !12, size: 64)
	!22 = !{!23, !24}
	!23 = !DILocalVariable(name: "fn4", arg: 1, scope: !18, file: !1, line: 5, type: !21)
	!24 = !DILocalVariable(name: "x", scope: !18, file: !1, line: 9, type: !10)
	!25 = !DILocation(line: 0, scope: !18)
	!26 = !DILocation(line: 6, column: 3, scope: !18)
	!27 = !DILocation(line: 7, column: 3, scope: !18)
	!28 = !DILocation(line: 9, column: 11, scope: !18)
	!29 = !DILocation(line: 10, column: 8, scope: !30)
	!30 = distinct !DILexicalBlock(scope: !18, file: !1, line: 10, column: 7)
	!31 = !DILocation(line: 10, column: 7, scope: !18)
	!32 = !DILocation(line: 11, column: 12, scope: !30)
	!33 = !DILocation(line: 14, column: 1, scope: !18)

	...
	---
	name: fn1
	callSites:
	- { bb: 0, offset: 7, fwdArgRegs: [] }
	- { bb: 0, offset: 9, fwdArgRegs:
	- { arg: 0, reg: '$edi' } }
	- { bb: 0, offset: 11, fwdArgRegs: [] }
	- { bb: 2, offset: 7, fwdArgRegs: [] }
	body: \|
	bb.0.entry:
	successors: %bb.2(0x30000000), %bb.1(0x50000000)
	liveins: $rdi, $rbx

	DBG_VALUE $rdi, $noreg, !23, !DIExpression(), debug-location !25
	frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp
	CFI_INSTRUCTION def_cfa_offset 16
	CFI_INSTRUCTION offset $rbx, -16
	$rbx = MOV64rr $rdi
	DBG_VALUE $rbx, $noreg, !23, !DIExpression(), debug-location !25
	dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !26
	CALL64pcrel32 @fn, csr_64, implicit $rsp, implicit $ssp, implicit $al, implicit-def $rsp, implicit-def $ssp, debug-location !26
	$edi = MOV32ri 5, debug-location !27
	CALL64pcrel32 @fn2, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit-def $rsp, implicit-def $ssp, debug-location !27
	dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !28
	CALL64r killed renamable $rbx, csr_64, implicit $rsp, implicit $ssp, implicit $al, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !28
	DBG_VALUE $eax, $noreg, !24, !DIExpression(), debug-location !25
	TEST32rr killed renamable $eax, renamable $eax, implicit-def $eflags, debug-location !29
	JCC_1 %bb.2, 4, implicit $eflags, debug-location !31

	bb.1.cleanup:
	DBG_VALUE $eax, $noreg, !24, !DIExpression(), debug-location !25
	DBG_VALUE $rbx, $noreg, !23, !DIExpression(), debug-location !25
	$eax = MOV32ri -1, debug-location !33
	$rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !33
	DBG_VALUE $rdi, $noreg, !23, !DIExpression(DW_OP_LLVM_entry_value, 1), debug-location !25
	CFI_INSTRUCTION def_cfa_offset 8, debug-location !33
	RETQ $eax, debug-location !33

	bb.2.if.then:
	CFI_INSTRUCTION def_cfa_offset 16, debug-location !32
	DBG_VALUE $eax, $noreg, !24, !DIExpression(), debug-location !25
	DBG_VALUE $rbx, $noreg, !23, !DIExpression(), debug-location !25
	dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !32
	$rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !32
	DBG_VALUE $rdi, $noreg, !23, !DIExpression(DW_OP_LLVM_entry_value, 1), debug-location !25
	CFI_INSTRUCTION def_cfa_offset 8, debug-location !32
	TAILJMPd64 @fn3, csr_64, implicit $rsp, implicit $ssp, implicit $rsp, implicit $ssp, implicit $al, debug-location !32

	...