| # RUN: sed 's_;AAAAAA __' < %s \ |
| # RUN: | llc -x mir -o - -start-before=phi-node-elimination \ |
| # RUN: -stop-after=stack-slot-coloring -simplify-mir \ |
| # RUN: -experimental-debug-variable-locations=true \ |
| # RUN: | FileCheck %s --check-prefix=DBGPHIS |
| # RUN: sed 's_;BBBBBB __' < %s \ |
| # RUN: | llc -x mir -o - -start-before=phi-node-elimination \ |
| # RUN: -stop-after=stack-slot-coloring -simplify-mir \ |
| # RUN: -experimental-debug-variable-locations=false \ |
| # RUN: | FileCheck %s --check-prefix=DBGVALS |
| # |
| # Test that DBG_PHI instructions do not add "weight" to stack slots and cause |
| # their coalescing / coloring to change. This is hard to trigger, because it's |
| # closely coupled with the register allocator. Thus, the test is very |
| # complicated and hard to reduce. |
| # |
| # In block 13 there are two implementations of variable location tracking, but |
| # both are commented out. Use sed in the command lines above to un-comment |
| # each one and test what it does: in each case, the PHI should occur in |
| # %stack.4 rather than anywhere else. |
| # |
| # Future register allocator changes might change the slot; in that case, just |
| # update the slot number, so long as it's the same between each RUN. |
| # |
| # DBGPHIS: DBG_PHI %stack.4, |
| # DBGVALS: DBG_VALUE %stack.4, |
| |
| --- | |
| 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" |
| |
| define hidden fastcc i64 @amd64_push_arguments(i32 *%regcache, i32 *%args) unnamed_addr !dbg !4 { |
| ret i64 0 |
| } |
| |
| ; Function Attrs: nofree nosync nounwind readnone speculatable willreturn |
| declare void @llvm.dbg.value(metadata, metadata, metadata) |
| |
| !llvm.module.flags = !{!0, !1} |
| !llvm.dbg.cu = !{!2} |
| |
| !0 = !{i32 2, !"Debug Info Version", i32 3} |
| !1 = !{i32 2, !"Dwarf Version", i32 4} |
| !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "beards", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug) |
| !3 = !DIFile(filename: "bees.cpp", directory: ".") |
| !4 = distinct !DISubprogram(name: "nope", scope: !3, file: !3, line: 1, type: !5, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !8) |
| !5 = !DISubroutineType(types: !6) |
| !6 = !{!7} |
| !7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) |
| !8 = !{} |
| !9 = !DILocation(line: 0, scope: !4) |
| !10 = !DILocalVariable(name: "flannel", scope: !4, file: !3, line: 1, type: !7) |
| ... |
| --- |
| name: amd64_push_arguments |
| alignment: 16 |
| tracksRegLiveness: true |
| registers: |
| - { id: 0, class: gr32 } |
| - { id: 1, class: gr32 } |
| - { id: 2, class: gr32 } |
| - { id: 3, class: gr64 } |
| - { id: 4, class: gr32 } |
| - { id: 5, class: gr32 } |
| - { id: 6, class: gr32 } |
| - { id: 7, class: gr32 } |
| - { id: 8, class: gr64 } |
| - { id: 9, class: gr32 } |
| - { id: 10, class: gr32 } |
| - { id: 11, class: gr64 } |
| - { id: 12, class: gr32 } |
| - { id: 13, class: gr64 } |
| - { id: 14, class: gr32 } |
| - { id: 15, class: gr64 } |
| - { id: 16, class: gr64 } |
| - { id: 17, class: gr64 } |
| - { id: 18, class: gr32 } |
| - { id: 19, class: gr8 } |
| - { id: 20, class: gr64 } |
| - { id: 21, class: gr32 } |
| - { id: 22, class: gr32 } |
| - { id: 23, class: gr8 } |
| - { id: 24, class: gr32 } |
| - { id: 25, class: gr32 } |
| - { id: 26, class: gr32 } |
| - { id: 27, class: gr32 } |
| - { id: 28, class: gr8 } |
| - { id: 29, class: gr32 } |
| - { id: 30, class: gr8 } |
| - { id: 31, class: gr32 } |
| - { id: 32, class: gr32 } |
| - { id: 33, class: gr32 } |
| - { id: 34, class: gr8 } |
| - { id: 35, class: gr32 } |
| - { id: 36, class: gr64 } |
| - { id: 37, class: gr32 } |
| - { id: 38, class: gr32 } |
| - { id: 39, class: gr8 } |
| - { id: 40, class: gr32 } |
| - { id: 41, class: gr8 } |
| - { id: 42, class: gr32 } |
| - { id: 43, class: gr32 } |
| - { id: 44, class: gr64_nosp } |
| - { id: 45, class: gr64 } |
| - { id: 46, class: gr32 } |
| - { id: 47, class: gr64 } |
| - { id: 48, class: gr32 } |
| - { id: 49, class: gr32 } |
| - { id: 50, class: gr64 } |
| - { id: 51, class: gr64 } |
| - { id: 52, class: gr64 } |
| - { id: 53, class: gr64 } |
| - { id: 54, class: gr32 } |
| - { id: 55, class: gr64 } |
| - { id: 56, class: gr32 } |
| liveins: |
| - { reg: '$rdi', virtual-reg: '%15' } |
| frameInfo: |
| maxAlignment: 8 |
| hasCalls: true |
| stack: |
| - { id: 0, size: 8, alignment: 8 } |
| - { id: 1, type: variable-sized, alignment: 1 } |
| machineFunctionInfo: {} |
| body: | |
| bb.0: |
| successors: %bb.2(0x00000800), %bb.1(0x7ffff800) |
| liveins: $rdi |
| |
| %15:gr64 = COPY killed $rdi |
| ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !9 |
| ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !9 |
| %18:gr32 = MOV32r0 implicit-def dead $eflags |
| %19:gr8 = COPY killed %18.sub_8bit |
| TEST8rr killed %19, %19, implicit-def $eflags, debug-location !9 |
| JCC_1 %bb.2, 5, implicit killed $eflags, debug-location !9 |
| JMP_1 %bb.1, debug-location !9 |
| |
| bb.1: |
| RET 0, undef $rax |
| |
| bb.2: |
| %27:gr32 = MOV32r0 implicit-def dead $eflags |
| %50:gr64 = LEA64r %stack.0, 1, $noreg, 0, $noreg |
| %54:gr32 = MOV32ri 8 |
| |
| bb.3: |
| successors: %bb.4, %bb.5 |
| |
| %0:gr32 = PHI undef %21:gr32, %bb.2, %0, %bb.5, %0, %bb.6, %0, %bb.8, %0, %bb.10, %10, %bb.21 |
| %23:gr8 = COPY %27.sub_8bit |
| TEST8rr killed %23, %23, implicit-def $eflags, debug-location !9 |
| JCC_1 %bb.5, 5, implicit killed $eflags, debug-location !9 |
| JMP_1 %bb.4, debug-location !9 |
| |
| bb.4: |
| %24:gr32 = MOV32ri 1 |
| |
| bb.5: |
| successors: %bb.3(0x20000000), %bb.6(0x60000000) |
| |
| %1:gr32 = PHI %27, %bb.3, %24, %bb.4, debug-location !9 |
| %25:gr32 = nsw ADD32rr %1, %0, implicit-def dead $eflags, debug-location !9 |
| CMP32ri8 killed %25, 6, implicit-def $eflags, debug-location !9 |
| JCC_1 %bb.3, 7, implicit killed $eflags, debug-location !9 |
| JMP_1 %bb.6, debug-location !9 |
| |
| bb.6: |
| successors: %bb.3(0x2aaaaaab), %bb.7(0x55555555) |
| |
| %28:gr8 = COPY %27.sub_8bit |
| TEST8rr killed %28, %28, implicit-def $eflags, debug-location !9 |
| JCC_1 %bb.3, 5, implicit killed $eflags, debug-location !9 |
| JMP_1 %bb.7, debug-location !9 |
| |
| bb.7: |
| successors: %bb.8(0x60000000), %bb.9(0x20000000) |
| |
| TEST32rr killed %1, %1, implicit-def $eflags, debug-location !9 |
| JCC_1 %bb.9, 5, implicit killed $eflags, debug-location !9 |
| JMP_1 %bb.8, debug-location !9 |
| |
| bb.8: |
| successors: %bb.3(0x55555555), %bb.9(0x2aaaaaab) |
| |
| %30:gr8 = COPY %27.sub_8bit |
| TEST8rr killed %30, %30, implicit-def $eflags, debug-location !9 |
| JCC_1 %bb.3, 5, implicit killed $eflags, debug-location !9 |
| JMP_1 %bb.9, debug-location !9 |
| |
| bb.9: |
| successors: %bb.10(0x80000000), %bb.12(0x00000000) |
| |
| CMP32ri8 undef %32:gr32, 16, implicit-def $eflags, debug-location !9 |
| JCC_1 %bb.12, 15, implicit killed $eflags, debug-location !9 |
| JMP_1 %bb.10, debug-location !9 |
| |
| bb.10: |
| successors: %bb.11, %bb.3 |
| |
| %34:gr8 = COPY %27.sub_8bit |
| TEST8rr killed %34, %34, implicit-def $eflags, debug-location !9 |
| JCC_1 %bb.3, 5, implicit killed $eflags, debug-location !9 |
| JMP_1 %bb.11, debug-location !9 |
| |
| bb.11: |
| %36:gr64 = SUBREG_TO_REG 0, %27, %subreg.sub_32bit |
| JMP_1 %bb.13, debug-location !9 |
| |
| bb.12: |
| successors: |
| |
| |
| bb.13: |
| successors: %bb.18(0x2aaaaaab), %bb.14(0x55555555) |
| |
| %2:gr32 = PHI undef %35:gr32, %bb.11, %14, %bb.21 |
| %3:gr64 = PHI %36, %bb.11, %13, %bb.21 |
| ;AAAAAA %4:gr32 = PHI %0, %bb.11, %10, %bb.21, debug-instr-number 1 |
| ;BBBBBB %4:gr32 = PHI %0, %bb.11, %10, %bb.21 |
| %5:gr32 = PHI undef %35:gr32, %bb.11, %9, %bb.21 |
| ;AAAAAA DBG_INSTR_REF 1, 0, !10, !DIExpression(), debug-location !9 |
| ;BBBBBB DBG_VALUE %4, 0, !10, !DIExpression(), debug-location !9 |
| %39:gr8 = COPY %27.sub_8bit |
| TEST8rr killed %39, %39, implicit-def $eflags, debug-location !9 |
| JCC_1 %bb.18, 5, implicit killed $eflags, debug-location !9 |
| JMP_1 %bb.14, debug-location !9 |
| |
| bb.14: |
| successors: %bb.17(0x40000001), %bb.15(0x3fffffff) |
| |
| %41:gr8 = COPY %27.sub_8bit |
| TEST8rr killed %41, %41, implicit-def $eflags, debug-location !9 |
| JCC_1 %bb.17, 5, implicit killed $eflags, debug-location !9 |
| JMP_1 %bb.15, debug-location !9 |
| |
| bb.15: |
| |
| bb.16: |
| %6:gr32 = nsw INC32r killed %4, implicit-def dead $eflags, debug-location !9 |
| %48:gr32 = MOV32r0 implicit-def dead $eflags |
| JMP_1 %bb.21, debug-location !9 |
| |
| bb.17: |
| %7:gr32 = nsw INC32r killed %5, implicit-def dead $eflags, debug-location !9 |
| %46:gr32 = MOV32r0 implicit-def dead $eflags |
| JMP_1 %bb.21, debug-location !9 |
| |
| bb.18: |
| successors: %bb.20(0x80000000), %bb.19(0x00000000) |
| |
| TEST32rr %5, %5, implicit-def $eflags, debug-location !9 |
| JCC_1 %bb.20, 15, implicit killed $eflags, debug-location !9 |
| JMP_1 %bb.19, debug-location !9 |
| |
| bb.19: |
| successors: |
| |
| |
| bb.20: |
| %43:gr32 = nsw DEC32r %5, implicit-def dead $eflags, debug-location !9 |
| %44:gr64_nosp = SUBREG_TO_REG 0, killed %43, %subreg.sub_32bit |
| ; Fiddled with to morph into llvm test, |
| %8:gr64 = LEA64r $noreg, 4, killed %44, @amd64_push_arguments, $noreg, debug-location !9 |
| %42:gr32 = MOV32ri 8 |
| JMP_1 %bb.21, debug-location !9 |
| |
| bb.21: |
| successors: %bb.13(0x7c000000), %bb.3(0x04000000) |
| |
| %9:gr32 = PHI %5, %bb.20, %7, %bb.17, %5, %bb.16, debug-location !9 |
| %10:gr32 = PHI %4, %bb.20, %4, %bb.17, %6, %bb.16, debug-location !9 |
| %11:gr64 = PHI %8, %bb.20, undef %45:gr64, %bb.17, undef %47:gr64, %bb.16 |
| %12:gr32 = PHI %42, %bb.20, %46, %bb.17, %48, %bb.16, debug-location !9 |
| %49:gr32 = MOV32rm killed %11, 1, $noreg, 0, $noreg, debug-location !9 :: (load (s32) from `i32 *undef`) |
| ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !9 |
| $rdi = COPY %50, debug-location !9 |
| CALL64pcrel32 target-flags(x86-plt) &memcpy, csr_64, implicit $rsp, implicit $ssp, implicit killed $rdi, implicit undef $rsi, implicit undef $rdx, implicit-def $rsp, implicit-def $ssp, implicit-def dead $rax, debug-location !9 |
| ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !9 |
| ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !9 |
| $rdi = COPY %15, debug-location !9 |
| $esi = COPY killed %49, debug-location !9 |
| $edx = COPY killed %12, debug-location !9 |
| $ecx = COPY %54, debug-location !9 |
| $r8 = COPY %50, debug-location !9 |
| CALL64r undef %55:gr64, csr_64, implicit $rsp, implicit $ssp, implicit killed $rdi, implicit killed $esi, implicit killed $edx, implicit killed $ecx, implicit killed $r8, implicit-def $rsp, implicit-def $ssp, debug-location !9 |
| ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !9 |
| %13:gr64 = nuw nsw INC64r killed %3, implicit-def dead $eflags, debug-location !9 |
| %14:gr32 = ADD32ri8 killed %2, -8, implicit-def dead $eflags, debug-location !9 |
| CMP32ri8 %14, 8, implicit-def $eflags, debug-location !9 |
| JCC_1 %bb.13, 15, implicit killed $eflags, debug-location !9 |
| JMP_1 %bb.3, debug-location !9 |
| |
| ... |
