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710c823515
Introduce the llvm.arm.hint(i32) intrinsic that can be used to inject hints into the instruction stream. This is particularly useful for generating IR from a compiler where the user may inject an intrinsic (e.g. __yield). These are then pattern substituted into the correct instruction which already existed. llvm-svn: 207242
70 lines
1.1 KiB
LLVM
70 lines
1.1 KiB
LLVM
; RUN: llc -mtriple armv7-eabi -o - %s | FileCheck %s
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; RUN: llc -mtriple thumbv6m-eabi -o - %s | FileCheck %s
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; RUN: llc -mtriple thumbv7-eabi -o - %s | FileCheck %s
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declare void @llvm.arm.hint(i32) nounwind
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define void @hint_nop() {
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entry:
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tail call void @llvm.arm.hint(i32 0) nounwind
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ret void
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}
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; CHECK-LABEL: hint_nop
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; CHECK: nop
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define void @hint_yield() {
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entry:
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tail call void @llvm.arm.hint(i32 1) nounwind
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ret void
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}
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; CHECK-LABEL: hint_yield
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; CHECK: yield
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define void @hint_wfe() {
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entry:
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tail call void @llvm.arm.hint(i32 2) nounwind
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ret void
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}
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; CHECK-LABEL: hint_wfe
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; CHECK: wfe
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define void @hint_wfi() {
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entry:
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tail call void @llvm.arm.hint(i32 3) nounwind
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ret void
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}
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; CHECK-LABEL: hint_wfi
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; CHECK: wfi
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define void @hint_sev() {
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entry:
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tail call void @llvm.arm.hint(i32 4) nounwind
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ret void
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}
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; CHECK-LABEL: hint_sev
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; CHECK: sev
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define void @hint_sevl() {
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entry:
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tail call void @llvm.arm.hint(i32 5) nounwind
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ret void
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}
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; CHECK-LABEL: hint_sevl
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; CHECK: hint #5
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define void @hint_undefined() {
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entry:
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tail call void @llvm.arm.hint(i32 8) nounwind
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ret void
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}
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; CHECK-LABEL: hint_undefined
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; CHECK: hint #8
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