clang/test/CodeGen/asm-inout.c

   1 // RUN: %clang_cc1 -triple i386-unknown-unknown -emit-llvm %s -o - | FileCheck %s
   2 // PR3800
   3 int *foo(void);
   4
   5 // CHECK: @test1
   6 void test1(void) {
   7   // CHECK: [[REGCALLRESULT:%[a-zA-Z0-9\.]+]] = call ptr @foo()
   8   // CHECK: call void asm "foobar", "=*m,*m,~{dirflag},~{fpsr},~{flags}"(ptr elementtype(i32) [[REGCALLRESULT]], ptr elementtype(i32) [[REGCALLRESULT]])
   9   asm ("foobar" : "+m"(*foo()));
  10 }
  11
  12 // CHECK: @test2
  13 void test2(void) {
  14   // CHECK: [[REGCALLRESULT:%[a-zA-Z0-9\.]+]] = call ptr @foo()
  15   // CHECK: load i32, ptr [[REGCALLRESULT]]
  16   // CHECK: call i32 asm
  17   // CHECK: store i32 {{%[a-zA-Z0-9\.]+}}, ptr [[REGCALLRESULT]]
  18   asm ("foobar" : "+r"(*foo()));
  19 }
  20
  21 // PR7338
  22 // CHECK: @test3
  23 void test3(int *vout, int vin)
  24 {
  25   // CHECK: call void asm "opr $0,$1", "=*r|m|r,r|m|r,~{edi},~{dirflag},~{fpsr},~{flags}"
  26   asm ("opr %[vout],%[vin]"
  27        : [vout] "=r,=m,=r" (*vout)
  28        : [vin] "r,m,r" (vin)
  29        : "edi");
  30 }
  31
  32 // PR8959 - This should implicitly truncate the immediate to a byte.
  33 // CHECK: @test4
  34 int test4(volatile int *addr) {
  35   unsigned char oldval;
  36   // CHECK: call i8 asm "frob $0", "=r,0{{.*}}"(i8 -1)
  37   __asm__ ("frob %0" : "=r"(oldval) : "0"(0xff));
  38   return (int)oldval;
  39 }
  40
  41 // This should have both inputs be of type <1 x i64>.
  42 // CHECK: @test5
  43 typedef long long __m64 __attribute__((__vector_size__(8)));
  44 __m64 test5(__m64 __A, __m64 __B) {
  45   // CHECK: call <1 x i64> asm "pmulhuw $1, $0\0A\09", "=y,y,0,~{dirflag},~{fpsr},~{flags}"(<1 x i64> %{{.*}}, <1 x i64> %{{.*}})
  46   asm ("pmulhuw %1, %0\n\t" : "+y" (__A) : "y" (__B));
  47   return __A;
  48 }
  49
  50 // CHECK: @test6
  51 int test6(void) {
  52   typedef unsigned char __attribute__((vector_size(8))) _m64u8;
  53   _m64u8 __attribute__((aligned(16))) Mu8_0, __attribute__((aligned(16))) Mu8_1;
  54   // CHECK: call <8 x i8> asm "nop", "=y,0,~{dirflag},~{fpsr},~{flags}"(<8 x i8> %0)
  55   asm ("nop" : "=y"(Mu8_1 ) : "0"(Mu8_0 ));
  56   return 0;
  57 }