Index: llvm/test/DebugInfo/MIR/Mips/last-inst-bundled.mir
===================================================================
--- llvm/test/DebugInfo/MIR/Mips/last-inst-bundled.mir
+++ llvm/test/DebugInfo/MIR/Mips/last-inst-bundled.mir
@@ -21,7 +21,7 @@
#
# Check that last bundled instruction of block gets recognized as end of basic block.
# CHECK: bb.2.if.end
-# CHECK-NEXT: DBG_VALUE $s0, $noreg, !12, !DIExpression(), debug-location !17
+# CHECK-NEXT: DBG_VALUE $s0, $noreg, !12, !DIExpression()
--- |
; ModuleID = '<stdin>'
Index: llvm/test/DebugInfo/MIR/X86/kill-after-spill.mir
===================================================================
--- llvm/test/DebugInfo/MIR/X86/kill-after-spill.mir
+++ llvm/test/DebugInfo/MIR/X86/kill-after-spill.mir
@@ -14,8 +14,8 @@
# ...
#
# CHECK: bb.1.if.end:
-# CHECK: DBG_VALUE $rbp, 0, !37, !DIExpression(DW_OP_constu, 44, DW_OP_minus), debug-location !58
-# CHECK-NOT: DBG_VALUE $rbp, 0, !36, !DIExpression(DW_OP_constu, 48, DW_OP_minus), debug-location !57
+# CHECK: DBG_VALUE $rbp, 0, !37, !DIExpression(DW_OP_constu, 44, DW_OP_minus)
+# CHECK-NOT: DBG_VALUE $rbp, 0, !36, !DIExpression(DW_OP_constu, 48, DW_OP_minus)
--- |
; ModuleID = '<stdin>'
@@ -283,7 +283,7 @@
$r13 = MOV64rr $rax
renamable $ecx = XOR32rr undef $ecx, undef $ecx, implicit-def dead $eflags
renamable $r13 = AND64rr killed renamable $r13, renamable $r14, implicit-def $eflags
- JCC_1 %bb.9, 4, implicit $eflags
+ JCC_1 %bb.9, 4, implicit $eflags, debug-location !57
bb.1.if.end:
successors: %bb.2(0x30000000), %bb.3(0x50000000)
@@ -301,7 +301,7 @@
$r12 = MOV64rr $rax
$r15 = MOV64rr $r12
renamable $r15 = AND64ri8 killed renamable $r15, -123, implicit-def $eflags
- JCC_1 %bb.2, 4, implicit $eflags
+ JCC_1 %bb.2, 4, implicit $eflags, debug-location !57
bb.3.private.exit:
successors: %bb.9(0x30000000), %bb.4(0x50000000)
@@ -316,7 +316,7 @@
CALL64pcrel32 @func4, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit-def $rsp, implicit-def $ssp, implicit-def $eax
renamable $ecx = MOV32ri 1
TEST32rr killed renamable $eax, renamable $eax, implicit-def $eflags
- JCC_1 %bb.9, 4, implicit $eflags
+ JCC_1 %bb.9, 4, implicit $eflags, debug-location !57
bb.4.if.then8:
successors: %bb.8(0x30000000), %bb.5(0x50000000)
@@ -327,21 +327,21 @@
CALL64pcrel32 @func5, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit $esi, implicit-def $rsp, implicit-def $ssp
renamable $rax = MOV64rm killed renamable $r13, 1, $noreg, 8, $noreg :: (load 8 from %ir.13)
TEST64rr renamable $rax, renamable $rax, implicit-def $eflags
- JCC_1 %bb.8, 4, implicit $eflags
+ JCC_1 %bb.8, 4, implicit $eflags, debug-location !57
bb.5.land.lhs.true:
successors: %bb.6(0x30000000), %bb.7(0x50000000)
liveins: $rax, $r12, $r15
CMP32mi8 renamable $r15, 1, $noreg, 0, $noreg, 0, implicit-def $eflags :: (load 4 from %ir.tot_perf2, align 8)
- JCC_1 %bb.7, 5, implicit $eflags
+ JCC_1 %bb.7, 5, implicit $eflags, debug-location !57
bb.6.lor.lhs.false:
successors: %bb.8(0x30000000), %bb.7(0x50000000)
liveins: $rax, $r12, $r15
CMP32mi8 killed renamable $r15, 1, $noreg, 4, $noreg, 0, implicit-def $eflags :: (load 4 from %ir.tot_bw)
- JCC_1 %bb.8, 4, implicit $eflags
+ JCC_1 %bb.8, 4, implicit $eflags, debug-location !57
bb.7.if.then14:
successors: %bb.8(0x80000000)
@@ -350,13 +350,13 @@
renamable $rdx = MOV64rm killed renamable $rax, 1, $noreg, 8, $noreg :: (load 8 from %ir.20)
$rdi = MOV64rr killed $r12
$esi = MOV32rm $rbp, 1, $noreg, -44, $noreg :: (load 4 from %stack.1)
- CALL64pcrel32 @func6, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit $esi, implicit $rdx, implicit-def $rsp, implicit-def $ssp
+ CALL64pcrel32 @func6, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit $esi, implicit $rdx, implicit-def $rsp, implicit-def $ssp, debug-location !57
bb.8.cleanup:
successors: %bb.9(0x80000000)
renamable $ecx = MOV32ri 1
- JMP_1 %bb.9
+ JMP_1 %bb.9, debug-location !57
bb.2.if.then3:
successors: %bb.9(0x80000000)
@@ -369,7 +369,7 @@
$edx = MOV32ri 5
$r8d = MOV32rm $rbp, 1, $noreg, -48, $noreg :: (load 4 from %stack.0)
CALL64pcrel32 @func3, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit $esi, implicit $edx, implicit $rcx, implicit $r8d, implicit-def $rsp, implicit-def $ssp
- renamable $ecx = XOR32rr undef $ecx, undef $ecx, implicit-def dead $eflags
+ renamable $ecx = XOR32rr undef $ecx, undef $ecx, implicit-def dead $eflags, debug-location !57
bb.9.cleanup:
liveins: $ecx
@@ -382,6 +382,6 @@
$r14 = POP64r implicit-def $rsp, implicit $rsp
$r15 = POP64r implicit-def $rsp, implicit $rsp
$rbp = POP64r implicit-def $rsp, implicit $rsp
- RETQ $eax
+ RETQ $eax, debug-location !57
...
Index: llvm/test/DebugInfo/MIR/X86/live-debug-values-3preds.mir
===================================================================
--- llvm/test/DebugInfo/MIR/X86/live-debug-values-3preds.mir
+++ llvm/test/DebugInfo/MIR/X86/live-debug-values-3preds.mir
@@ -31,9 +31,9 @@
# DBG_VALUE for variables "x", "y" and "z" are extended into %bb.9 from its
# predecessors %bb.0, %bb.2 and %bb.8.
# CHECK: bb.9.for.end:
-# CHECK-DAG: DBG_VALUE $edi, $noreg, ![[X_VAR]], !DIExpression(), debug-location !{{[0-9]+}}
-# CHECK-DAG: DBG_VALUE $esi, $noreg, ![[Y_VAR]], !DIExpression(), debug-location !{{[0-9]+}}
-# CHECK-DAG: DBG_VALUE $edx, $noreg, ![[Z_VAR]], !DIExpression(), debug-location !{{[0-9]+}}
+# CHECK-DAG: DBG_VALUE $edi, $noreg, ![[X_VAR]], !DIExpression()
+# CHECK-DAG: DBG_VALUE $esi, $noreg, ![[Y_VAR]], !DIExpression()
+# CHECK-DAG: DBG_VALUE $edx, $noreg, ![[Z_VAR]], !DIExpression()
# CHECK: RET
--- |
Index: llvm/test/DebugInfo/MIR/X86/live-debug-values-bad-transfer.mir
===================================================================
--- llvm/test/DebugInfo/MIR/X86/live-debug-values-bad-transfer.mir
+++ llvm/test/DebugInfo/MIR/X86/live-debug-values-bad-transfer.mir
@@ -1,4 +1,5 @@
# RUN: llc %s -mtriple=x86_64-unknown-unknown -o - -run-pass=livedebugvalues | FileCheck %s --implicit-check-not=DBG_VALUE
+# RUN: llc %s -mtriple=x86_64-unknown-unknown -o - -run-pass=livedebugvalues -experimental-debug-variable-locations | FileCheck %s -check-prefix=NEWLDV --implicit-check-not=DBG_VALUE
#
# Test that the DBG_VALUE of ecx below does not get propagated. It is considered
# live-in on LiveDebugValues' first pass through the loop, but on the second it
@@ -17,6 +18,13 @@
# CHECK-LABEL: bb.1.loop:
# CHECK: $ebx = COPY killed $ecx
# CHECK-NEXT: DBG_VALUE
+#
+# This doesn't occur under value-tracking LiveDebugValues though.
+#
+# NEWLDV-LABEL: name: foo
+# NEWLDV-LABEL: bb.0.entry:
+# NEWLDV: $ecx = MOV32ri 0
+# NEWLDV-NEXT: DBG_VALUE
--- |
source_filename = "live-debug-values-remove-range.ll"
@@ -74,30 +82,30 @@
CFI_INSTRUCTION def_cfa_offset 16
CFI_INSTRUCTION offset $rbx, -16
$ebx = MOV32rr $edi
- $eax = MOV32ri 0
- $ecx = MOV32ri 0
+ $eax = MOV32ri 0, debug-location !10
+ $ecx = MOV32ri 0, debug-location !10
DBG_VALUE $ecx, $noreg, !9, !DIExpression(), debug-location !10
- $edi = MOV32ri 0
- $esi = MOV32ri 0
+ $edi = MOV32ri 0, debug-location !10
+ $esi = MOV32ri 0, debug-location !10
bb.1.loop:
successors: %bb.1, %bb.2
liveins: $ebx, $eax, $ecx, $edi, $esi
- $eax = COPY $ecx
- $ebx = COPY killed $ecx
- $ecx = COPY killed $edi
- $edi = COPY killed $esi
- $esi = MOV32ri 1
+ $eax = COPY $ecx, debug-location !10
+ $ebx = COPY killed $ecx, debug-location !10
+ $ecx = COPY killed $edi, debug-location !10
+ $edi = COPY killed $esi, debug-location !10
+ $esi = MOV32ri 1, debug-location !10
TEST8ri killed renamable $al, 1, implicit-def $eflags
- JCC_1 %bb.1, 5, implicit killed $eflags
+ JCC_1 %bb.1, 5, implicit killed $eflags, debug-location !10
bb.2.exit:
liveins: $ebx
- $eax = MOV32rr killed $ebx
+ $eax = MOV32rr killed $ebx, debug-location !10
$rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp
CFI_INSTRUCTION def_cfa_offset 8
- RETQ $eax
+ RETQ $eax, debug-location !10
...
Index: llvm/test/DebugInfo/MIR/X86/live-debug-values.mir
===================================================================
--- llvm/test/DebugInfo/MIR/X86/live-debug-values.mir
+++ llvm/test/DebugInfo/MIR/X86/live-debug-values.mir
@@ -35,7 +35,7 @@
# CHECK: ![[N_VAR:[0-9]+]] = !DILocalVariable(name: "n",{{.*}})
#
# CHECK: bb.5.if.end.7:
-# CHECK: DBG_VALUE $ebx, $noreg, ![[N_VAR]], !DIExpression(), debug-location !{{[0-9]+}}
+# CHECK: DBG_VALUE $ebx, $noreg, ![[N_VAR]], !DIExpression()
--- |
Index: llvm/test/DebugInfo/MIR/X86/livedebugvalues-ignores-metaInstructions.mir
===================================================================
--- llvm/test/DebugInfo/MIR/X86/livedebugvalues-ignores-metaInstructions.mir
+++ llvm/test/DebugInfo/MIR/X86/livedebugvalues-ignores-metaInstructions.mir
@@ -6,11 +6,11 @@
; CHECK-LABEL: bb.0.entry:
; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
; CHECK-LABEL: bb.1.bb1:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.2.bb2:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.3.bb3:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
define i32 @_Z8bb_to_bb() local_unnamed_addr !dbg !12 {
entry:
Index: llvm/test/DebugInfo/MIR/X86/livedebugvalues_basic_diamond.mir
===================================================================
--- llvm/test/DebugInfo/MIR/X86/livedebugvalues_basic_diamond.mir
+++ llvm/test/DebugInfo/MIR/X86/livedebugvalues_basic_diamond.mir
@@ -5,13 +5,13 @@
; a diamond that doesn't move or clobber their locations.
; CHECK-LABEL: bb.0.entry:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.1.bb1:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.2.bb2:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.3.bb3:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
define i32 @_Z8bb_to_bb() local_unnamed_addr !dbg !12 {
entry:
Index: llvm/test/DebugInfo/MIR/X86/livedebugvalues_basic_diamond_match_clobber.mir
===================================================================
--- llvm/test/DebugInfo/MIR/X86/livedebugvalues_basic_diamond_match_clobber.mir
+++ llvm/test/DebugInfo/MIR/X86/livedebugvalues_basic_diamond_match_clobber.mir
@@ -5,12 +5,12 @@
; a diamond when the location is clobbered and not into the successor block.
; CHECK-LABEL: bb.0.entry:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.1.bb1:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-NEXT: $ebx = MOV32ri 0, debug-location !17
; CHECK-LABEL: bb.2.bb2:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-NEXT: $ebx = MOV32ri 0, debug-location !17
define i32 @_Z8bb_to_bb() local_unnamed_addr !dbg !12 {
Index: llvm/test/DebugInfo/MIR/X86/livedebugvalues_basic_diamond_match_move.mir
===================================================================
--- llvm/test/DebugInfo/MIR/X86/livedebugvalues_basic_diamond_match_move.mir
+++ llvm/test/DebugInfo/MIR/X86/livedebugvalues_basic_diamond_match_move.mir
@@ -5,17 +5,17 @@
; diamond CFG when the location is moved by another instruction.
; CHECK-LABEL: bb.0.entry:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.1.bb1:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-NEXT: $eax = MOV32ri 0, debug-location !17
- ; CHECK-NEXT: DBG_VALUE $eax, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK-NEXT: DBG_VALUE $eax, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.2.bb2:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-NEXT: $eax = MOV32ri 0, debug-location !17
- ; CHECK-NEXT: DBG_VALUE $eax, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK-NEXT: DBG_VALUE $eax, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.3.bb3:
- ; CHECK: DBG_VALUE $eax, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $eax, $noreg, !16, !DIExpression()
define i32 @_Z8bb_to_bb() local_unnamed_addr !dbg !12 {
entry:
Index: llvm/test/DebugInfo/MIR/X86/livedebugvalues_basic_diamond_one_clobber.mir
===================================================================
--- llvm/test/DebugInfo/MIR/X86/livedebugvalues_basic_diamond_one_clobber.mir
+++ llvm/test/DebugInfo/MIR/X86/livedebugvalues_basic_diamond_one_clobber.mir
@@ -5,11 +5,11 @@
; of a diamond CFG that clobbers its location.
; CHECK-LABEL: bb.0.entry:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.1.bb1:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.2.bb2:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
define i32 @_Z8bb_to_bb() local_unnamed_addr !dbg !12 {
entry:
Index: llvm/test/DebugInfo/MIR/X86/livedebugvalues_basic_diamond_one_move.mir
===================================================================
--- llvm/test/DebugInfo/MIR/X86/livedebugvalues_basic_diamond_one_move.mir
+++ llvm/test/DebugInfo/MIR/X86/livedebugvalues_basic_diamond_one_move.mir
@@ -5,13 +5,13 @@
; of a diamond CFG that moves its location.
; CHECK-LABEL: bb.0.entry:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.1.bb1:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-NEXT: $eax = MOV32ri 0, debug-location !17
- ; CHECK: DBG_VALUE $eax, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $eax, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.2.bb2:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
define i32 @_Z8bb_to_bb() local_unnamed_addr !dbg !12 {
entry:
Index: llvm/test/DebugInfo/MIR/X86/livedebugvalues_basic_loop.mir
===================================================================
--- llvm/test/DebugInfo/MIR/X86/livedebugvalues_basic_loop.mir
+++ llvm/test/DebugInfo/MIR/X86/livedebugvalues_basic_loop.mir
@@ -5,13 +5,13 @@
; loop that doesn't move or clobber its location.
; CHECK-LABEL: bb.0.entry:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.1.bb1:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.2.bb2:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.3.bb3:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
define i32 @_Z8bb_to_bb() local_unnamed_addr !dbg !12 {
entry:
Index: llvm/test/DebugInfo/MIR/X86/livedebugvalues_bb_to_bb.mir
===================================================================
--- llvm/test/DebugInfo/MIR/X86/livedebugvalues_bb_to_bb.mir
+++ llvm/test/DebugInfo/MIR/X86/livedebugvalues_bb_to_bb.mir
@@ -5,13 +5,13 @@
; sequential CFG.
; CHECK-LABEL: bb.0.entry:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.1.bb1:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.2.bb2:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.3.bb3:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
define i32 @_Z8bb_to_bb() local_unnamed_addr !dbg !12 {
entry:
Index: llvm/test/DebugInfo/MIR/X86/livedebugvalues_bb_to_bb_clobbered.mir
===================================================================
--- llvm/test/DebugInfo/MIR/X86/livedebugvalues_bb_to_bb_clobbered.mir
+++ llvm/test/DebugInfo/MIR/X86/livedebugvalues_bb_to_bb_clobbered.mir
@@ -5,9 +5,9 @@
; control flow when it's location is clobbered.
; CHECK-LABEL: bb.0.entry:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.1.bb1:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
define i32 @_Z8bb_to_bb() local_unnamed_addr !dbg !12 {
entry:
Index: llvm/test/DebugInfo/MIR/X86/livedebugvalues_bb_to_bb_move_to_clobber.mir
===================================================================
--- llvm/test/DebugInfo/MIR/X86/livedebugvalues_bb_to_bb_move_to_clobber.mir
+++ llvm/test/DebugInfo/MIR/X86/livedebugvalues_bb_to_bb_move_to_clobber.mir
@@ -5,13 +5,13 @@
; no control flow when a location is moved and then clobbered.
; CHECK-LABEL: bb.0.entry:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.1.bb1:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-NEXT: $eax = MOV32ri 0, debug-location !17
- ; CHECK: DBG_VALUE $eax, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $eax, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.2.bb2:
- ; CHECK: DBG_VALUE $eax, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $eax, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.3.bb3:
define i32 @_Z8bb_to_bb() local_unnamed_addr !dbg !12 {
Index: llvm/test/DebugInfo/MIR/X86/livedebugvalues_load_in_loop.mir
===================================================================
--- /dev/null
+++ llvm/test/DebugInfo/MIR/X86/livedebugvalues_load_in_loop.mir
@@ -0,0 +1,113 @@
+--- |
+ ; RUN: llc %s -march=x86-64 -run-pass=livedebugvalues -o - -experimental-debug-variable-locations -emulate-old-livedebugvalues=0 | FileCheck %s -implicit-check-not=DBG_VALUE
+
+ ; Sometimes, variables can have multiple locations, and when control flow
+ ; merges LiveDebugValues has a hard time picking which one the variable lives
+ ; in. Test two of these scenarios that old LiveDebugValues can't handle: when
+ ; a value is in two registers, and when a value is both in a register and
+ ; on the stack.
+
+ ; In a register:
+
+ ; CHECK-LABEL: bb.0.entry:
+ ; CHECK: DBG_VALUE $rdi, $noreg, !16, !DIExpression()
+ ; CHECK-LABEL: bb.1.bb1:
+ ; CHECK: DBG_VALUE $rbp, $noreg, !16, !DIExpression()
+ ; CHECK: DBG_VALUE $rbp, $noreg, !16, !DIExpression()
+ ; CHECK-LABEL: bb.2.bb2:
+ ; CHECK: DBG_VALUE $rbp, $noreg, !16, !DIExpression()
+ ; CHECK-LABEL: bb.3.bb3:
+ ; CHECK: DBG_VALUE $rbp, $noreg, !16, !DIExpression()
+
+ ; On the stack: we move from $rbp to a stack slot in bb4, but join back on
+ ; $rbp in bb6.
+
+ ; CHECK-LABEL: bb.4:
+ ; CHECK: DBG_VALUE $rbp, $noreg, !16, !DIExpression()
+ ; CHECK: DBG_VALUE $rsp, 0, !16, !DIExpression()
+ ; CHECK-LABEL: bb.5:
+ ; CHECK: DBG_VALUE $rbp, $noreg, !16, !DIExpression()
+ ; CHECK-LABEL: bb.6:
+ ; CHECK: DBG_VALUE $rbp, $noreg, !16, !DIExpression()
+
+ declare i64 @bees(i64 %arg);
+
+ define i32 @_Z8bb_to_bb(i64 %arg) local_unnamed_addr !dbg !12 {
+ entry:
+ br label %bb1, !dbg !17
+ bb1:
+ br label %bb2, !dbg !17
+ bb2:
+ br label %bb3, !dbg !17
+ bb3:
+ ret i32 0, !dbg !17
+ }
+
+ !llvm.dbg.cu = !{!0}
+ !llvm.module.flags = !{!7, !8, !9, !10}
+ !llvm.ident = !{!11}
+ !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 10.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, globals: !3, debugInfoForProfiling: true, nameTableKind: None)
+ !1 = !DIFile(filename: "main.cpp", directory: "F:\")
+ !2 = !{}
+ !3 = !{!4}
+ !4 = !DIGlobalVariableExpression(var: !5, expr: !DIExpression())
+ !5 = distinct !DIGlobalVariable(name: "start", scope: !0, file: !1, line: 4, type: !6, isLocal: false, isDefinition: true)
+ !6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+ !7 = !{i32 2, !"Dwarf Version", i32 4}
+ !8 = !{i32 2, !"Debug Info Version", i32 3}
+ !9 = !{i32 1, !"wchar_size", i32 2}
+ !10 = !{i32 7, !"PIC Level", i32 2}
+ !11 = !{!"clang version 10.0.0"}
+ !12 = distinct !DISubprogram(name: "bb_to_bb", linkageName: "bb_to_bb", scope: !1, file: !1, line: 6, type: !13, scopeLine: 6, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !15)
+ !13 = !DISubroutineType(types: !14)
+ !14 = !{!6, !6}
+ !15 = !{!16}
+ !16 = !DILocalVariable(name: "myVar", scope: !12, file: !1, line: 7, type: !6)
+ !17 = !DILocation(line: 10, scope: !12)
+
+...
+---
+name: _Z8bb_to_bb
+tracksRegLiveness: true
+liveins:
+ - { reg: '$rdi', virtual-reg: '' }
+stack:
+ - { id: 0, name: '', type: spill-slot, offset: -8, size: 8, alignment: 8,
+ stack-id: default, callee-saved-register: '', callee-saved-restored: true,
+ debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
+body: |
+ bb.0.entry:
+ liveins: $rdi
+ successors: %bb.1, %bb.2
+ DBG_VALUE $rdi, $noreg, !16, !DIExpression(), debug-location !17
+ $rbp = MOV64rr $rdi, debug-location !17
+ dead $rcx = MOV64ri 0, debug-location !17
+ CALL64pcrel32 @bees, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit-def $rsp, implicit-def $ssp, implicit-def $rax, debug-location !17
+ CMP64ri8 renamable $rax, 1, implicit-def $eflags, debug-location !17
+ JCC_1 %bb.2, 4, implicit killed $eflags, debug-location !17
+ bb.1.bb1:
+ liveins: $rax, $rbp
+ successors: %bb.3
+ $rbp = MOV64ri 0, debug-location !17
+ DBG_VALUE $rbp, $noreg, !16, !DIExpression(), debug-location !17
+ JMP_1 %bb.3
+ bb.2.bb2:
+ liveins: $rax, $rbp
+ successors: %bb.3
+ $rax = MOV64ri 0, debug-location !17
+ bb.3.bb3:
+ liveins: $rax, $rbp
+ $rdi = MOV64rr $rbp, debug-location !17
+ CALL64pcrel32 @bees, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit-def $rsp, implicit-def $ssp, implicit-def $rax, debug-location !17
+ CMP64ri8 renamable $rax, 1, implicit-def $eflags, debug-location !17
+ JCC_1 %bb.5, 4, implicit killed $eflags, debug-location !17
+ bb.4:
+ liveins: $rax, $rbp
+ MOV64mr $rsp, 1, $noreg, 8, $noreg, killed renamable $rbp :: (store 8 into %stack.0)
+ JMP_1 %bb.6
+ bb.5:
+ liveins: $rax, $rbp
+ bb.6:
+ liveins: $rax, $rbp
+ RETQ $rax, debug-location !17
+...
Index: llvm/test/DebugInfo/MIR/X86/livedebugvalues_loop_break.mir
===================================================================
--- llvm/test/DebugInfo/MIR/X86/livedebugvalues_loop_break.mir
+++ llvm/test/DebugInfo/MIR/X86/livedebugvalues_loop_break.mir
@@ -5,15 +5,15 @@
; break.
; CHECK-LABEL: bb.0.entry:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.1.bb1:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.2.bb2:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.3.bb3:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.4.bb4:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
define i32 @_Z8bb_to_bb() local_unnamed_addr !dbg !12 {
entry:
Index: llvm/test/DebugInfo/MIR/X86/livedebugvalues_loop_diamond.mir
===================================================================
--- llvm/test/DebugInfo/MIR/X86/livedebugvalues_loop_diamond.mir
+++ llvm/test/DebugInfo/MIR/X86/livedebugvalues_loop_diamond.mir
@@ -5,17 +5,17 @@
; diamond pattern and beyond.
; CHECK-LABEL: bb.0.entry:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.1.bb1:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.2.bb2:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.3.bb3:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.4.bb4:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.5.bb5:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
define i32 @_Z8bb_to_bb() local_unnamed_addr !dbg !12 {
entry:
Index: llvm/test/DebugInfo/MIR/X86/livedebugvalues_loop_diamond_move.mir
===================================================================
--- llvm/test/DebugInfo/MIR/X86/livedebugvalues_loop_diamond_move.mir
+++ llvm/test/DebugInfo/MIR/X86/livedebugvalues_loop_diamond_move.mir
@@ -5,17 +5,17 @@
; diamond pattern but not beyond.
; CHECK-LABEL: bb.0.entry:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.1.bb1:
- ; CHECK: DBG_VALUE $eax, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $eax, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.2.bb2:
- ; CHECK: DBG_VALUE $eax, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $eax, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.3.bb3:
- ; CHECK: DBG_VALUE $eax, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $eax, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.4.bb4:
- ; CHECK: DBG_VALUE $eax, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $eax, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.5.bb5:
- ; CHECK: DBG_VALUE $eax, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $eax, $noreg, !16, !DIExpression()
define i32 @_Z8bb_to_bb() local_unnamed_addr !dbg !12 {
entry:
Index: llvm/test/DebugInfo/MIR/X86/livedebugvalues_loop_two_backedge.mir
===================================================================
--- llvm/test/DebugInfo/MIR/X86/livedebugvalues_loop_two_backedge.mir
+++ llvm/test/DebugInfo/MIR/X86/livedebugvalues_loop_two_backedge.mir
@@ -5,15 +5,15 @@
; backedges and beyond.
; CHECK-LABEL: bb.0.entry:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.1.bb1:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.2.bb2:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.3.bb3:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.4.bb4:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
define i32 @_Z8bb_to_bb() local_unnamed_addr !dbg !12 {
entry:
Index: llvm/test/DebugInfo/MIR/X86/livedebugvalues_loop_within_loop.mir
===================================================================
--- llvm/test/DebugInfo/MIR/X86/livedebugvalues_loop_within_loop.mir
+++ llvm/test/DebugInfo/MIR/X86/livedebugvalues_loop_within_loop.mir
@@ -4,17 +4,17 @@
; Check that DBG_VALUE instructions are propagated into loops within loops.
; CHECK-LABEL: bb.0.entry:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.1.bb1:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.2.bb2:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.3.bb3:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.4.bb4:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.5.bb5:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
define i32 @_Z8bb_to_bb() local_unnamed_addr !dbg !12 {
entry:
Index: llvm/test/DebugInfo/MIR/X86/livedebugvalues_loop_within_loop_moved.mir
===================================================================
--- llvm/test/DebugInfo/MIR/X86/livedebugvalues_loop_within_loop_moved.mir
+++ llvm/test/DebugInfo/MIR/X86/livedebugvalues_loop_within_loop_moved.mir
@@ -5,9 +5,9 @@
; loops that move their locations.
; CHECK-LABEL: bb.0.entry:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.3.bb3:
- ; CHECK: DBG_VALUE $eax, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $eax, $noreg, !16, !DIExpression()
define i32 @_Z8bb_to_bb() local_unnamed_addr !dbg !12 {
entry:
Index: llvm/test/DebugInfo/MIR/X86/livedebugvalues_loop_within_loop_outer_moved.mir
===================================================================
--- llvm/test/DebugInfo/MIR/X86/livedebugvalues_loop_within_loop_outer_moved.mir
+++ llvm/test/DebugInfo/MIR/X86/livedebugvalues_loop_within_loop_outer_moved.mir
@@ -5,11 +5,11 @@
; loops that move their locations.
; CHECK-LABEL: bb.0.entry:
- ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $ebx, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.4.bb4:
- ; CHECK: DBG_VALUE $eax, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $eax, $noreg, !16, !DIExpression()
; CHECK-LABEL: bb.5.bb5:
- ; CHECK: DBG_VALUE $eax, $noreg, !16, !DIExpression(), debug-location !17
+ ; CHECK: DBG_VALUE $eax, $noreg, !16, !DIExpression()
define i32 @_Z8bb_to_bb() local_unnamed_addr !dbg !12 {
entry:
Index: llvm/test/DebugInfo/MIR/X86/livedebugvalues_many_loop_heads.mir
===================================================================
--- /dev/null
+++ llvm/test/DebugInfo/MIR/X86/livedebugvalues_many_loop_heads.mir
@@ -0,0 +1,196 @@
+--- |
+ ; RUN: llc %s -march=x86-64 -run-pass=livedebugvalues -o - -experimental-debug-variable-locations | FileCheck %s -implicit-check-not=DBG_VALUE
+
+ ; The MIR below represents a pathalogical case for value-tracking
+ ; LiveDebugValues. The code structure is eight nested loops, with loop heads
+ ; from bb.1 to bb.8, a central block bb.9 that does nothing, and loop ends
+ ; from bb.10 to bb.17. The CMP's and jumps might be broken; the only
+ ; important part is that it looks like nested loops to LiveDebugValues.
+ ;
+ ; The variable location is always $rsi, which enters the function live.
+ ; There's also a def of $rsi in bb.14, in a loop tail, half way into the
+ ; loop nest.s.
+ ;
+ ; This presents a serious problem: the outer four loops each implicitly have
+ ; a PHI value for $rsi, because the block could be entered on a path straight
+ ; from entry, or from bb.14 where $rsi is def'd. While the innermost four
+ ; loops have a value of $rsi that is live-through each loop from bb.5
+ ; onwards.
+ ;
+ ; Value-tracking LiveDebugValues _must_ correctly identify each PHI value.
+ ; Observe the DBG_VALUE in bb.2: this variable location musn't be propagated
+ ; any further, because there's a path to either successor that goes through
+ ; bb.14 where the value is overwritten.Value tracking needs to identify the
+ ; PHI value on entry to the block; and that each successor has a different
+ ; PHI value in that register.
+ ;
+ ; Likewise, we mustn't identify values as PHIs which aren't. Entering bb.5
+ ; has a PHI value (from bb.4) in $rsi. There are no paths to bb.5 that pass
+ ; through the clobbering bb.14, which don't also pass through bb.4: thus
+ ; that value is live-through the innermost four loops. If we
+ ; over-approximated where PHIs happened, we would lose variable location
+ ; coverage here, by not propagating the variable location through the inner
+ ; loops.
+ ;
+ ; Getting this right requires the lattice descent (described in the
+ ; implementation) to search loop head PHI values, until one is found that is
+ ; live-through a loop.
+
+ ; This location in bb.2 should not be propagated further,
+ ; CHECK-LABEL: bb.2:
+ ; CHECK: DBG_VALUE $rsi, $noreg
+
+ ; This location should be live through the inner loops, til bb.14
+ ; CHECK-LABEL: bb.5:
+ ; CHECK: DBG_VALUE $rsi, $noreg
+ ; CHECK-LABEL: bb.6:
+ ; CHECK: DBG_VALUE $rsi, $noreg
+ ; CHECK-LABEL: bb.7:
+ ; CHECK: DBG_VALUE $rsi, $noreg
+ ; CHECK-LABEL: bb.8:
+ ; CHECK: DBG_VALUE $rsi, $noreg
+ ; CHECK-LABEL: bb.9:
+ ; CHECK: DBG_VALUE $rsi, $noreg
+ ; CHECK-LABEL: bb.10:
+ ; CHECK: DBG_VALUE $rsi, $noreg
+ ; CHECK-LABEL: bb.11:
+ ; CHECK: DBG_VALUE $rsi, $noreg
+ ; CHECK-LABEL: bb.12:
+ ; CHECK: DBG_VALUE $rsi, $noreg
+ ; CHECK-LABEL: bb.13:
+ ; CHECK: DBG_VALUE $rsi, $noreg
+
+ declare i64 @bees(i64 %arg);
+
+ define i32 @chiasm(i64 %arg) local_unnamed_addr !dbg !12 {
+ entry:
+ br label %bb1, !dbg !17
+ bb1:
+ br label %bb2, !dbg !17
+ bb2:
+ br label %bb3, !dbg !17
+ bb3:
+ ret i32 0, !dbg !17
+ }
+
+ !llvm.dbg.cu = !{!0}
+ !llvm.module.flags = !{!7, !8, !9, !10}
+ !llvm.ident = !{!11}
+ !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 10.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, globals: !3, debugInfoForProfiling: true, nameTableKind: None)
+ !1 = !DIFile(filename: "main.cpp", directory: "F:\")
+ !2 = !{}
+ !3 = !{!4}
+ !4 = !DIGlobalVariableExpression(var: !5, expr: !DIExpression())
+ !5 = distinct !DIGlobalVariable(name: "start", scope: !0, file: !1, line: 4, type: !6, isLocal: false, isDefinition: true)
+ !6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+ !7 = !{i32 2, !"Dwarf Version", i32 4}
+ !8 = !{i32 2, !"Debug Info Version", i32 3}
+ !9 = !{i32 1, !"wchar_size", i32 2}
+ !10 = !{i32 7, !"PIC Level", i32 2}
+ !11 = !{!"clang version 10.0.0"}
+ !12 = distinct !DISubprogram(name: "bb_to_bb", linkageName: "bb_to_bb", scope: !1, file: !1, line: 6, type: !13, scopeLine: 6, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !15)
+ !13 = !DISubroutineType(types: !14)
+ !14 = !{!6, !6}
+ !15 = !{!16}
+ !16 = !DILocalVariable(name: "myVar", scope: !12, file: !1, line: 7, type: !6)
+ !17 = !DILocation(line: 10, scope: !12)
+
+...
+---
+name: chiasm
+tracksRegLiveness: true
+liveins:
+ - { reg: '$rdi', virtual-reg: '' }
+stack:
+ - { id: 0, name: '', type: spill-slot, offset: -8, size: 8, alignment: 8,
+ stack-id: default, callee-saved-register: '', callee-saved-restored: true,
+ debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
+body: |
+ bb.0.entry:
+ liveins: $rdi, $rsi
+
+ bb.1:
+ liveins: $rsi, $rdi
+ CMP64ri8 renamable $rdi, 1, implicit-def $eflags, debug-location !17
+ JCC_1 %bb.17, 4, implicit $eflags, debug-location !17
+
+ bb.2:
+ liveins: $rsi, $rdi
+ DBG_VALUE $rsi, $noreg, !16, !DIExpression(), debug-location !17
+ CMP64ri8 renamable $rdi, 2, implicit-def $eflags, debug-location !17
+ JCC_1 %bb.16, 4, implicit $eflags, debug-location !17
+
+ bb.3:
+ liveins: $rsi, $rdi
+ CMP64ri8 renamable $rdi, 3, implicit-def $eflags, debug-location !17
+ JCC_1 %bb.15, 4, implicit $eflags, debug-location !17
+
+ bb.4:
+ liveins: $rsi, $rdi
+ CMP64ri8 renamable $rdi, 4, implicit-def $eflags, debug-location !17
+ JCC_1 %bb.14, 4, implicit $eflags, debug-location !17
+
+ bb.5:
+ liveins: $rsi, $rdi
+ DBG_VALUE $rsi, $noreg, !16, !DIExpression(), debug-location !17
+ CMP64ri8 renamable $rdi, 4, implicit-def $eflags, debug-location !17
+ JCC_1 %bb.13, 4, implicit $eflags, debug-location !17
+
+ bb.6:
+ liveins: $rsi, $rdi
+ CMP64ri8 renamable $rdi, 4, implicit-def $eflags, debug-location !17
+ JCC_1 %bb.12, 4, implicit $eflags, debug-location !17
+
+ bb.7:
+ liveins: $rsi, $rdi
+ CMP64ri8 renamable $rdi, 4, implicit-def $eflags, debug-location !17
+ JCC_1 %bb.11, 4, implicit $eflags, debug-location !17
+
+ bb.8:
+ liveins: $rsi, $rdi
+ CMP64ri8 renamable $rdi, 4, implicit-def $eflags, debug-location !17
+ JCC_1 %bb.10, 4, implicit $eflags, debug-location !17
+
+ bb.9:
+ liveins: $rsi, $rdi, $eflags
+ ;$rsi = MOV64ri 0, debug-location !17
+ ;JMP_1 %bb.1, debug-location !17
+
+ bb.10:
+ liveins: $rsi, $rdi, $eflags
+ JCC_1 %bb.8, 4, implicit $eflags, debug-location !17
+
+ bb.11:
+ liveins: $rsi, $rdi, $eflags
+ JCC_1 %bb.7, 4, implicit $eflags, debug-location !17
+
+ bb.12:
+ liveins: $rsi, $rdi, $eflags
+ JCC_1 %bb.6, 4, implicit $eflags, debug-location !17
+
+ bb.13:
+ liveins: $rsi, $rdi, $eflags
+ JCC_1 %bb.5, 4, implicit $eflags, debug-location !17
+
+ bb.14:
+ liveins: $rsi, $rdi, $eflags
+ $rsi = MOV64ri 0, debug-location !17
+ JCC_1 %bb.4, 4, implicit $eflags, debug-location !17
+
+ bb.15:
+ liveins: $rsi, $rdi, $eflags
+ JCC_1 %bb.3, 4, implicit $eflags, debug-location !17
+
+ bb.16:
+ liveins: $rsi, $rdi, $eflags
+ JCC_1 %bb.2, 4, implicit $eflags, debug-location !17
+
+ bb.17:
+ liveins: $rsi, $rdi, $eflags
+ JCC_1 %bb.1, 4, implicit $eflags, debug-location !17
+
+ bb.18:
+ liveins: $rsi, $rdi, $eflags
+ RETQ
+
+...