clang/test/CodeGen/asm-variable.c

   1 // RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm %s -o - | FileCheck %s
   2
   3 unsigned long long foo(unsigned long long addr, unsigned long long a0,
   4                        unsigned long long a1, unsigned long long a2,
   5                        unsigned long long a3, unsigned long long a4,
   6                        unsigned long long a5) {
   7   register unsigned long long result asm("rax");
   8   register unsigned long long b0 asm("rdi");
   9   register unsigned long long b1 asm("rsi");
  10   register unsigned long long b2 asm("rdx");
  11   register unsigned long long b3 asm("rcx");
  12   register unsigned long long b4 asm("r8");
  13   register unsigned long long b5 asm("r9");
  14
  15   b0 = a0;
  16   b1 = a1;
  17   b2 = a2;
  18   b3 = a3;
  19   b4 = a4;
  20   b5 = a5;
  21
  22   asm("call *%1" : "=r" (result)
  23       : "r"(addr), "r" (b0), "r" (b1), "r" (b2), "r" (b3), "r" (b4), "r" (b5));
  24   return result;
  25 }
  26
  27 // CHECK: call i64 asm "call *$1", "={rax},r,{rdi},{rsi},{rdx},{rcx},{r8},{r9},~{dirflag},~{fpsr},~{flags}"
  28
  29 unsigned long long foo2(unsigned long long addr, double a0,
  30                        double a1, double a2,
  31                        double a3, double a4,
  32                        double a5, double a6, double a7) {
  33   register double b0 asm("xmm0");
  34   register double b1 asm("xmm1");
  35   register double b2 asm("xmm2");
  36   register double b3 asm("xmm3");
  37   register double b4 asm("xmm4");
  38   register double b5 asm("xmm5");
  39   register double b6 asm("xmm6");
  40   register double b7 asm("xmm7");
  41
  42   register unsigned long long result asm("rax");
  43
  44   b0 = a0;
  45   b1 = a1;
  46   b2 = a2;
  47   b3 = a3;
  48   b4 = a4;
  49   b5 = a5;
  50   b6 = a6;
  51   b7 = a7;
  52
  53   asm("call *%1" : "=r" (result)
  54       : "r"(addr), "x" (b0), "x" (b1), "x" (b2), "x" (b3), "x" (b4), "x" (b5), "x" (b6),
  55         "x" (b7));
  56   return result;
  57 }
  58
  59 // CHECK: call i64 asm "call *$1", "={rax},r,{xmm0},{xmm1},{xmm2},{xmm3},{xmm4},{xmm5},{xmm6},{xmm7},~{dirflag},~{fpsr},~{flags}
  60
  61 int randomvar asm("randomvar");
  62 void foo3(void) {
  63   asm("vartest %0" : : "r"(randomvar));
  64 }
  65 // CHECK: call void asm sideeffect "vartest $0", "r,~{dirflag},~{fpsr},~{flags}"