| # RUN: llc -mtriple=i686-unknown-unknown -run-pass=x86-flags-copy-lowering \ |
| # RUN: -print-after=x86-flags-copy-lowering %s -o - | FileCheck %s |
| # |
| # Check that $eflags is removed from live-in lists of successor blocks. |
| # |
| # CHECK-NOT: liveins: $eflags |
| |
| --- | |
| define void @fun(i16 %arg, i64 %arg1, i8 %arg2, i8* %arg3, i32 %arg4) { ret void} |
| ... |
| --- |
| name: fun |
| alignment: 16 |
| tracksRegLiveness: true |
| registers: |
| - { id: 0, class: gr16 } |
| - { id: 1, class: gr16 } |
| - { id: 2, class: gr16 } |
| - { id: 3, class: gr32 } |
| - { id: 4, class: gr32 } |
| - { id: 5, class: gr8 } |
| - { id: 6, class: gr32 } |
| - { id: 7, class: gr32 } |
| - { id: 8, class: gr32 } |
| - { id: 9, class: gr32 } |
| - { id: 10, class: gr32 } |
| - { id: 11, class: gr32 } |
| - { id: 12, class: gr32 } |
| - { id: 13, class: gr8 } |
| - { id: 14, class: gr32 } |
| - { id: 15, class: gr32 } |
| - { id: 16, class: gr32_abcd } |
| - { id: 17, class: gr8 } |
| - { id: 18, class: gr8 } |
| - { id: 19, class: gr32 } |
| - { id: 20, class: gr32 } |
| frameInfo: |
| maxAlignment: 4 |
| fixedStack: |
| - { id: 0, offset: 20, size: 4, alignment: 4, isImmutable: true } |
| - { id: 1, offset: 16, size: 4, alignment: 4, isImmutable: true } |
| - { id: 2, offset: 12, size: 1, alignment: 4, isImmutable: true } |
| - { id: 3, offset: 8, size: 4, alignment: 4, isImmutable: true } |
| - { id: 4, offset: 4, size: 4, alignment: 4, isImmutable: true } |
| - { id: 5, size: 2, alignment: 4, isImmutable: true } |
| machineFunctionInfo: {} |
| body: | |
| bb.0: |
| %4:gr32 = MOV32rm %fixed-stack.3, 1, $noreg, 0, $noreg :: (load (s32) from %fixed-stack.3) |
| %3:gr32 = MOV32rm %fixed-stack.4, 1, $noreg, 0, $noreg :: (load (s32) from %fixed-stack.4) |
| %7:gr32 = MOV32rm %fixed-stack.0, 1, $noreg, 0, $noreg :: (load (s32) from %fixed-stack.0) |
| %6:gr32 = MOV32rm %fixed-stack.1, 1, $noreg, 0, $noreg :: (load (s32) from %fixed-stack.1) |
| %5:gr8 = MOV8rm %fixed-stack.2, 1, $noreg, 0, $noreg :: (load (s8) from %fixed-stack.2, align 4) |
| %9:gr32 = IMPLICIT_DEF |
| %11:gr32 = IMPLICIT_DEF |
| |
| bb.1: |
| successors: %bb.2, %bb.3 |
| |
| CMP32rr %3, %9, implicit-def $eflags |
| %10:gr32 = SBB32rr %4, %11, implicit-def $eflags, implicit $eflags |
| %12:gr32 = COPY $eflags |
| %13:gr8 = SETCCr 12, implicit $eflags |
| %14:gr32 = MOVZX32rr8 killed %13 |
| %15:gr32 = NEG32r %14, implicit-def dead $eflags |
| %16:gr32_abcd = MOV32r0 implicit-def dead $eflags |
| $eflags = COPY %12 |
| %17:gr8 = COPY %16.sub_8bit |
| JCC_1 %bb.3, 12, implicit $eflags |
| |
| bb.2: |
| liveins: $eflags |
| |
| |
| bb.3: |
| successors: %bb.4, %bb.5 |
| liveins: $eflags |
| |
| %18:gr8 = PHI %5, %bb.2, %17, %bb.1 |
| MOV8mr %6, 1, $noreg, 0, $noreg, killed %18 :: (volatile store (s8) into %ir.arg3) |
| JCC_1 %bb.5, 12, implicit $eflags |
| |
| bb.4: |
| |
| bb.5: |
| %19:gr32 = PHI %16, %bb.4, %15, %bb.3 |
| $eax = COPY %7 |
| CDQ implicit-def $eax, implicit-def $edx, implicit $eax |
| IDIV32r killed %19, implicit-def dead $eax, implicit-def $edx, implicit-def dead $eflags, implicit $eax, implicit $edx |
| JMP_1 %bb.1 |
| |
| ... |