File: inline-asm-clobber-warning.ll

package info (click to toggle)
llvm-toolchain-14 1%3A14.0.6-12
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,496,180 kB
  • sloc: cpp: 5,593,972; ansic: 986,872; asm: 585,869; python: 184,223; objc: 72,530; lisp: 31,119; f90: 27,793; javascript: 9,780; pascal: 9,762; sh: 9,482; perl: 7,468; ml: 5,432; awk: 3,523; makefile: 2,538; xml: 953; cs: 573; fortran: 567
file content (22 lines) | stat: -rw-r--r-- 890 bytes parent folder | download | duplicates (12) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
 
; RUN: llc < %s -verify-machineinstrs -mtriple=powerpc-unknown-unkown \
; RUN:   -mcpu=pwr7 2>&1 | FileCheck %s
; RUN: llc < %s -verify-machineinstrs -mtriple=powerpc64-unknown-unkown \
; RUN:   -mcpu=pwr7 2>&1 | FileCheck %s

define void @test_r1_clobber() {
entry:
  call void asm sideeffect "nop", "~{r1}"()
  ret void
}

; CHECK: warning: inline asm clobber list contains reserved registers: R1
; 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.

define void @test_x1_clobber() {
entry:
  call void asm sideeffect "nop", "~{x1}"()
  ret void
}

; CHECK: warning: inline asm clobber list contains reserved registers: X1
; 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.