6a028296fe
This patch emits a warning when the stack pointer register (`R1`) is found in the clobber list of an inline asm statement. Clobbering the stack pointer is not supported. Reviewed By: #powerpc, nemanjai Differential Revision: https://reviews.llvm.org/D112073
23 lines
890 B
LLVM
23 lines
890 B
LLVM
; RUN: llc < %s -verify-machineinstrs -mtriple=powerpc-unknown-unkown \
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; RUN: -mcpu=pwr7 2>&1 | FileCheck %s
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; RUN: llc < %s -verify-machineinstrs -mtriple=powerpc64-unknown-unkown \
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; RUN: -mcpu=pwr7 2>&1 | FileCheck %s
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define void @test_r1_clobber() {
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entry:
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call void asm sideeffect "nop", "~{r1}"()
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ret void
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}
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; CHECK: warning: inline asm clobber list contains reserved registers: R1
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; CHECK-NEXT: note: Reserved registers on the clobber list may not be preserved across the asm statement, and clobbering them may lead to undefined behaviour.
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define void @test_x1_clobber() {
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entry:
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call void asm sideeffect "nop", "~{x1}"()
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ret void
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}
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; CHECK: warning: inline asm clobber list contains reserved registers: X1
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; CHECK-NEXT: note: Reserved registers on the clobber list may not be preserved across the asm statement, and clobbering them may lead to undefined behaviour.
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