c2f9885a8a
This adds support for marking arbitrary general purpose registers - except for those with special purpose (G0, I6-I7, O6-O7) - as reserved, as needed by some software like the Linux kernel.
14 lines
392 B
LLVM
14 lines
392 B
LLVM
; RUN: llc -mtriple=sparc64-linux-gnu -mattr=+reserve-l0 -o - %s | FileCheck %s --check-prefixes=CHECK-RESERVED-L0
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;; Ensure explicit register references are catched as well.
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; CHECK-RESERVED-L0: %l0
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define void @set_reg(i32 zeroext %x) {
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entry:
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tail call void @llvm.write_register.i32(metadata !0, i32 %x)
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ret void
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}
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declare void @llvm.write_register.i32(metadata, i32)
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!0 = !{!"l0"}
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