File: inline-asm-matching-constraint.c

package info (click to toggle)
llvm-toolchain-20 1%3A20.1.6-1~exp1
  • links: PTS, VCS
  • area: main
  • in suites: experimental
  • size: 2,111,304 kB
  • sloc: cpp: 7,438,677; ansic: 1,393,822; asm: 1,012,926; python: 241,650; f90: 86,635; objc: 75,479; lisp: 42,144; pascal: 17,286; sh: 10,027; ml: 5,082; perl: 4,730; awk: 3,523; makefile: 3,349; javascript: 2,251; xml: 892; fortran: 672
file content (11 lines) | stat: -rw-r--r-- 495 bytes parent folder | download | duplicates (36) 
1
2
3
4
5
6
7
8
9
10
11
 
// RUN: %clang_cc1 -emit-llvm %s -o - -triple powerpc64le-linux-gnu | FileCheck %s
// Sadly since this requires a register constraint to trigger we have to set
// a target here.
void a(void) {
  register unsigned long __sc_0 __asm__("r0");
  __asm__ __volatile__("mfcr %0" : "=&r"(__sc_0) : "0"(__sc_0));
}

// Check that we can generate code for this correctly. The matching input
// constraint should not have an early clobber on it.
// CHECK: call i64 asm sideeffect "mfcr $0", "=&{r0},{r0}"