derek.holloway
7502bf64a4
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26 lines
896 B
LLVM
26 lines
896 B
LLVM
; RUN: llc -mtriple=i686-unknown-linux-gnu -enable-misched=false < %s | FileCheck %s
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define fastcc i8 @fold32to8(i32 %add, i8 %spill) {
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; CHECK-LABEL: fold32to8:
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; CHECK: movl %ecx, (%esp) # 4-byte Spill
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; CHECK: subb (%esp), %dl # 1-byte Folded Reload
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entry:
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tail call void asm sideeffect "", "~{eax},~{ebx},~{ecx},~{edi},~{esi},~{ebp},~{dirflag},~{fpsr},~{flags}"()
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%trunc = trunc i32 %add to i8
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%sub = sub i8 %spill, %trunc
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ret i8 %sub
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}
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; Do not fold a 1-byte store into a 4-byte spill slot
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define fastcc i8 @nofold(i32 %add, i8 %spill) {
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; CHECK-LABEL: nofold:
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; CHECK: movl %edx, (%esp) # 4-byte Spill
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; CHECK: movl (%esp), %eax # 4-byte Reload
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; CHECK: subb %cl, %al
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entry:
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tail call void asm sideeffect "", "~{eax},~{ebx},~{edx},~{edi},~{esi},~{ebp},~{dirflag},~{fpsr},~{flags}"()
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%trunc = trunc i32 %add to i8
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%sub = sub i8 %spill, %trunc
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ret i8 %sub
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}
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