derek.holloway
7502bf64a4
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63 lines
2.1 KiB
LLVM
63 lines
2.1 KiB
LLVM
;; Check if manually reserved EDI is always excluded from being saved by the
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;; function prolog/epilog, as per GCC behavior, and that REP MOVS/STOS are not
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;; selected when EDI is reserved on x86-32.
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; RUN: llc < %s -mtriple=i386-unknown-linux-gnu -verify-machineinstrs | FileCheck %s
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declare void @llvm.memcpy.p0.p0.i32(ptr nocapture writeonly, ptr nocapture readonly, i32, i1 immarg)
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declare void @llvm.memset.p0.i32(ptr nocapture writeonly, i8, i32, i1 immarg)
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define void @tedi() "target-features"="+reserve-edi" {
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; CHECK-LABEL: tedi:
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; CHECK: # %bb.0:
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; CHECK-NEXT: movl $256, %edi
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; CHECK-NEXT: #APP
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; CHECK-NEXT: #NO_APP
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; CHECK-NEXT: retl
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call i32 asm sideeffect "", "={edi},{edi}"(i32 256)
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ret void
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}
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define void @no_reserve_edi() {
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; CHECK-LABEL: no_reserve_edi:
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; CHECK: # %bb.0:
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; CHECK-NEXT: pushl %edi
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; CHECK-NEXT: .cfi_def_cfa_offset 8
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; CHECK-NEXT: .cfi_offset %edi, -8
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; CHECK-NEXT: movl $256, %edi
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; CHECK-NEXT: #APP
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; CHECK-NEXT: #NO_APP
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; CHECK-NEXT: popl %edi
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; CHECK-NEXT: .cfi_def_cfa_offset 4
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; CHECK-NEXT: retl
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call i32 asm sideeffect "", "={edi},{edi}"(i32 256)
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ret void
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}
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define void @copy_reserved_edi(ptr %dst, ptr %src) minsize "target-features"="+reserve-edi" {
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; CHECK-LABEL: copy_reserved_edi:
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; CHECK-NOT: rep;movs
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call void @llvm.memcpy.p0.p0.i32(ptr align 4 %dst, ptr align 4 %src, i32 128, i1 false)
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ret void
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}
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define void @set_reserved_edi(ptr %dst) minsize "target-features"="+reserve-edi" {
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; CHECK-LABEL: set_reserved_edi:
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; CHECK-NOT: rep;stos
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call void @llvm.memset.p0.i32(ptr align 4 %dst, i8 0, i32 128, i1 false)
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ret void
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}
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define void @copy_no_reserved(ptr %dst, ptr %src) minsize {
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; CHECK-LABEL: copy_no_reserved:
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; CHECK: rep;movs
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call void @llvm.memcpy.p0.p0.i32(ptr align 4 %dst, ptr align 4 %src, i32 128, i1 false)
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ret void
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}
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define void @set_no_reserved(ptr %dst) minsize {
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; CHECK-LABEL: set_no_reserved:
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; CHECK: rep;stos
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call void @llvm.memset.p0.i32(ptr align 4 %dst, i8 0, i32 128, i1 false)
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ret void
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} |