38 lines
890 B
LLVM
38 lines
890 B
LLVM
; RUN: llc -verify-machineinstrs < %s | FileCheck %s
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target triple = "x86_64-pc-win32"
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declare i64 @llvm.x86.flags.read.u64()
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declare void @llvm.x86.flags.write.u64(i64)
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define i64 @read_flags() {
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entry:
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%flags = call i64 @llvm.x86.flags.read.u64()
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ret i64 %flags
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}
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; CHECK-LABEL: read_flags:
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; CHECK: pushq %rbp
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; CHECK: .seh_pushreg 5
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; CHECK: movq %rsp, %rbp
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; CHECK: .seh_setframe 5, 0
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; CHECK: .seh_endprologue
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; CHECK-NEXT: pushfq
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; CHECK-NEXT: popq %rax
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; CHECK-NEXT: popq %rbp
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define void @write_flags(i64 %arg) {
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entry:
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call void @llvm.x86.flags.write.u64(i64 %arg)
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ret void
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}
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; CHECK-LABEL: write_flags:
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; CHECK: pushq %rbp
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; CHECK: .seh_pushreg 5
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; CHECK: movq %rsp, %rbp
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; CHECK: .seh_setframe 5, 0
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; CHECK: .seh_endprologue
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; CHECK-NEXT: pushq %rcx
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; CHECK-NEXT: popfq
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; CHECK-NEXT: popq %rbp
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