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llvm-project/llvm/test/CodeGen/AArch64/aarch64-named-reg-x18.ll

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[AArch64] Reserve x18 register on Fuchsia This register is reserved as a platform register on Fuchsia. Differential Revision: https://reviews.llvm.org/D45105 llvm-svn: 328950
2018-04-02 07:44:04 +08:00
; RUN: llc -mtriple=aarch64-fuchsia -o - %s
[AArch64] Allow global register asm("x18") or asm("w18") under -ffixed-x18 When using -ffixed-x18, the x18 (or w18) register can safely be used with the "global register variable" GCC extension, but the backend fails to recognize it. Patch by Roland McGrath. Differential Revision: https://reviews.llvm.org/D31793 llvm-svn: 299799
2017-04-08 04:41:58 +08:00
define void @set_x18(i64 %x) {
entry:
; FIXME: Include an allocatable-specific error message
tail call void @llvm.write_register.i64(metadata !0, i64 %x)
ret void
}
declare void @llvm.write_register.i64(metadata, i64) nounwind
!0 = !{!"x18"}