| # Start after bbsections0-prepare and check if the right code is generated. |
| # RUN: llc -mtriple x86_64-unknown-linux-gnu -start-after=bbsections-prepare %s -o - | FileCheck %s -check-prefix=CHECK |
| |
| |
| # How to generate the input: |
| # foo.cc |
| # int foo(bool k) { |
| # if (k) return 1; |
| # return 0; |
| # } |
| # |
| # clang -O0 -S -emit-llvm foo.cc |
| # llc < foo.ll -stop-after=bbsections-prepare -basic-block-sections=all |
| |
| --- | |
| ; Function Attrs: noinline nounwind optnone uwtable |
| define dso_local i32 @_Z3foob(i1 zeroext %0) #0 { |
| %2 = alloca i32, align 4 |
| %3 = alloca i8, align 1 |
| %4 = zext i1 %0 to i8 |
| store i8 %4, i8* %3, align 1 |
| %5 = load i8, i8* %3, align 1 |
| %6 = trunc i8 %5 to i1 |
| br i1 %6, label %7, label %8 |
| |
| 7: ; preds = %1 |
| store i32 1, i32* %2, align 4 |
| br label %9 |
| |
| 8: ; preds = %1 |
| store i32 0, i32* %2, align 4 |
| br label %9 |
| |
| 9: ; preds = %8, %7 |
| %10 = load i32, i32* %2, align 4 |
| ret i32 %10 |
| } |
| |
| attributes #0 = { "frame-pointer"="all" "target-cpu"="x86-64" } |
| |
| |
| ... |
| --- |
| name: _Z3foob |
| alignment: 16 |
| exposesReturnsTwice: false |
| legalized: false |
| regBankSelected: false |
| selected: false |
| failedISel: false |
| tracksRegLiveness: true |
| hasWinCFI: false |
| registers: [] |
| liveins: |
| - { reg: '$edi', virtual-reg: '' } |
| frameInfo: |
| isFrameAddressTaken: false |
| isReturnAddressTaken: false |
| hasStackMap: false |
| hasPatchPoint: false |
| stackSize: 8 |
| offsetAdjustment: -8 |
| maxAlignment: 4 |
| adjustsStack: false |
| hasCalls: false |
| stackProtector: '' |
| maxCallFrameSize: 0 |
| cvBytesOfCalleeSavedRegisters: 0 |
| hasOpaqueSPAdjustment: false |
| hasVAStart: false |
| hasMustTailInVarArgFunc: false |
| localFrameSize: 0 |
| savePoint: '' |
| restorePoint: '' |
| fixedStack: |
| - { id: 0, type: spill-slot, offset: -16, size: 8, alignment: 16, stack-id: default, |
| callee-saved-register: '', callee-saved-restored: true, debug-info-variable: '', |
| debug-info-expression: '', debug-info-location: '' } |
| stack: |
| - { id: 0, type: default, offset: -24, size: 4, |
| alignment: 4, stack-id: default, callee-saved-register: '', callee-saved-restored: true, |
| debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } |
| - { id: 1, type: default, offset: -17, size: 1, |
| alignment: 1, stack-id: default, callee-saved-register: '', callee-saved-restored: true, |
| debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } |
| callSites: [] |
| constants: [] |
| machineFunctionInfo: {} |
| body: | |
| bb.0 (%ir-block.1, align 4, bbsections 0): |
| successors: %bb.2(0x40000000), %bb.1(0x40000000) |
| liveins: $edi |
| |
| frame-setup PUSH64r killed $rbp, implicit-def $rsp, implicit $rsp |
| CFI_INSTRUCTION def_cfa_offset 16 |
| CFI_INSTRUCTION offset $rbp, -16 |
| $rbp = frame-setup MOV64rr $rsp |
| CFI_INSTRUCTION def_cfa_register $rbp |
| renamable $dil = AND8ri renamable $dil, 1, implicit-def dead $eflags, implicit killed $edi, implicit-def $edi |
| MOV8mr $rbp, 1, $noreg, -1, $noreg, renamable $dil, implicit killed $edi :: (store (s8) into %ir.3) |
| TEST8mi $rbp, 1, $noreg, -1, $noreg, 1, implicit-def $eflags :: (load (s8) from %ir.3) |
| JCC_1 %bb.2, 4, implicit killed $eflags |
| JMP_1 %bb.1 |
| |
| bb.1 (%ir-block.7, bbsections 1): |
| successors: %bb.3(0x80000000) |
| |
| MOV32mi $rbp, 1, $noreg, -8, $noreg, 1 :: (store (s32) into %ir.2) |
| JMP_1 %bb.3 |
| |
| bb.2 (%ir-block.8, bbsections 2): |
| successors: %bb.3(0x80000000) |
| |
| MOV32mi $rbp, 1, $noreg, -8, $noreg, 0 :: (store (s32) into %ir.2) |
| JMP_1 %bb.3 |
| |
| bb.3 (%ir-block.9, bbsections 3): |
| renamable $eax = MOV32rm $rbp, 1, $noreg, -8, $noreg :: (load (s32) from %ir.2) |
| $rbp = frame-destroy POP64r implicit-def $rsp, implicit $rsp |
| CFI_INSTRUCTION def_cfa $rsp, 8 |
| RETQ implicit $eax |
| |
| ... |
| |
| # CHECK: .section .text._Z3foob,"ax",@progbits |
| # CHECK: _Z3foob: |
| # CHECK: .section .text._Z3foob,"ax",@progbits,unique |
| # CHECK: _Z3foob.__part.1: |
| # CHECK: .section .text._Z3foob,"ax",@progbits,unique |
| # CHECK: _Z3foob.__part.2: |
| # CHECK: .section .text._Z3foob,"ax",@progbits,unique |
| # CHECK: _Z3foob.__part.3: |