test/FrontendC/2010-05-18-asmsched.c

   1 // RUN: %llvmgcc %s -S -O3 -o - | llc -march=x86-64 -mtriple=x86_64-apple-darwin | FileCheck %s
   2 // r9 used to be clobbered before its value was moved to r10.  7993104.
   3
   4 void foo(int x, int y) {
   5 // CHECK: bar
   6 // CHECK-NOT: {{, %r9$}}
   7 // CHECK: movq  %r9,
   8 // CHECK: movq  {{.*}}, %r9
   9 // CHECK: bar
  10   register int lr9 asm("r9") = x;
  11   register int lr10 asm("r10") = y;
  12   int foo;
  13   asm volatile("bar" : "=r"(lr9) : "r"(lr9), "r"(lr10));
  14   foo = lr9;
  15   lr9 = x;
  16   lr10 = foo;
  17   asm volatile("bar" : "=r"(lr9) : "r"(lr9), "r"(lr10));
  18 }