84 lines
3.2 KiB
Plaintext
84 lines
3.2 KiB
Plaintext
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# RUN: llc -mtriple=i386-unknown-linux-gnu -mcpu=slm -run-pass post-RA-sched -o - %s | FileCheck %s
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#
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# Verify that the critical antidependence breaker does not consider
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# a high byte register as available as a replacement register
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# in a certain context.
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--- |
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define void @main() { ret void }
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...
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---
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# CHECK-LABEL: main
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name: main
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tracksRegLiveness: true
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frameInfo:
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stackSize: 52
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fixedStack:
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- { id: 0, type: spill-slot, offset: -20, size: 4, alignment: 4, callee-saved-register: '$esi' }
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- { id: 1, type: spill-slot, offset: -16, size: 4, alignment: 4, callee-saved-register: '$edi' }
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- { id: 2, type: spill-slot, offset: -12, size: 4, alignment: 4, callee-saved-register: '$ebx' }
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- { id: 3, type: spill-slot, offset: -8, size: 4, alignment: 4, callee-saved-register: '$ebp' }
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stack:
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- { id: 0, type: spill-slot, offset: -53, size: 1, alignment: 1 }
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- { id: 1, type: spill-slot, offset: -48, size: 4, alignment: 4 }
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- { id: 2, type: spill-slot, offset: -32, size: 4, alignment: 4 }
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body: |
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bb.0:
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liveins: $ebp, $ebx, $edi, $esi
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frame-setup PUSH32r killed $ebp, implicit-def $esp, implicit $esp
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frame-setup PUSH32r killed $ebx, implicit-def $esp, implicit $esp
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frame-setup PUSH32r killed $edi, implicit-def $esp, implicit $esp
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frame-setup PUSH32r killed $esi, implicit-def $esp, implicit $esp
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$esp = frame-setup SUB32ri8 $esp, 36, implicit-def dead $eflags
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$eax = MOV32ri 1
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$ebp = MOV32ri 2
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$ebx = MOV32ri 3
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$ecx = MOV32ri 4
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$edi = MOV32ri 5
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$edx = MOV32ri 6
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bb.1:
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liveins: $eax, $ebp, $ebx, $ecx, $edi, $edx
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$ebp = SHR32rCL killed $ebp, implicit-def dead $eflags, implicit $cl
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$ebp = XOR32rr killed $ebp, killed $ebx, implicit-def dead $eflags
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TEST32rr $edx, $edx, implicit-def $eflags
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$cl = SETCCr 5, implicit $eflags
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; This %bl def is antidependent on the above use of $ebx
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$bl = MOV8rm $esp, 1, $noreg, 3, _ ; :: (load 1 from %stack.0)
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$cl = OR8rr killed $cl, $bl, implicit-def dead $eflags
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$esi = MOVZX32rr8 killed $cl
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$esi = ADD32rr killed $esi, killed $edi, implicit-def dead $eflags
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$ecx = MOV32rm $esp, 1, $noreg, 24, _ ; :: (load 4 from %stack.2)
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$edx = SAR32rCL killed $edx, implicit-def dead $eflags, implicit $cl
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TEST32rr killed $edx, $edx, implicit-def $eflags
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$cl = SETCCr 5, implicit $eflags
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; Verify that removal of the $bl antidependence does not use $ch
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; as a replacement register.
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; CHECK: $cl = AND8rr killed $cl, killed $b
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$cl = AND8rr killed $cl, killed $bl, implicit-def dead $eflags
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CMP32ri8 $ebp, -1, implicit-def $eflags
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$edx = MOV32ri 0
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JCC_1 %bb.3, 4, implicit $eflags
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bb.2:
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liveins: $cl, $eax, $ebp, $esi
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OR32mr $esp, 1, $noreg, 8, $noreg, killed $eax, implicit-def $eflags ; :: (store 4 into %stack.1)
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$dl = SETCCr 5, implicit $eflags, implicit-def $edx
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bb.3:
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liveins: $cl, $ebp, $edx, $esi
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$eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags
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$esp = ADD32ri8 $esp, 36, implicit-def dead $eflags
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$esi = POP32r implicit-def $esp, implicit $esp
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$edi = POP32r implicit-def $esp, implicit $esp
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$ebx = POP32r implicit-def $esp, implicit $esp
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$ebp = POP32r implicit-def $esp, implicit $esp
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RET 0, $eax
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...
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