derek.holloway
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49 lines
1.1 KiB
LLVM
49 lines
1.1 KiB
LLVM
; RUN: llc < %s -mtriple=aarch64 -mcpu=cortex-a57 2>&1 | FileCheck %s
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define i64 @read_encoded_register() nounwind {
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entry:
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; CHECK-LABEL: read_encoded_register:
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; CHECK: mrs x0, S1_2_C3_C4_5
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%reg = call i64 @llvm.read_register.i64(metadata !0)
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ret i64 %reg
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}
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define i64 @read_daif() nounwind {
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entry:
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; CHECK-LABEL: read_daif:
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; CHECK: mrs x0, DAIF
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%reg = call i64 @llvm.read_register.i64(metadata !1)
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ret i64 %reg
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}
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define void @write_encoded_register(i64 %x) nounwind {
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entry:
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; CHECK-LABEL: write_encoded_register:
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; CHECK: msr S1_2_C3_C4_5, x0
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call void @llvm.write_register.i64(metadata !0, i64 %x)
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ret void
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}
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define void @write_daif(i64 %x) nounwind {
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entry:
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; CHECK-LABEL: write_daif:
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; CHECK: msr DAIF, x0
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call void @llvm.write_register.i64(metadata !1, i64 %x)
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ret void
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}
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define void @write_daifset() nounwind {
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entry:
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; CHECK-LABEL: write_daifset:
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; CHECK: msr DAIFSet, #2
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call void @llvm.write_register.i64(metadata !2, i64 2)
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ret void
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}
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declare i64 @llvm.read_register.i64(metadata) nounwind
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declare void @llvm.write_register.i64(metadata, i64) nounwind
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!0 = !{!"1:2:3:4:5"}
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!1 = !{!"daif"}
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!2 = !{!"daifset"}
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