clang/test/CodeGen/hexagon-brev-ld-ptr-incdec.c

   1 // REQUIRES: hexagon-registered-target
   2 // RUN: %clang_cc1 -emit-llvm -O2 -o - -triple hexagon-unknown-elf -target-cpu hexagonv60 %s | FileCheck %s
   3
   4 // The return value should return the value in A[1].
   5 // Check that the HexagonBuiltinExpr doesn't evaluate &(*ptr++) twice. If so,
   6 // the return value will be the value in A[2]
   7 // CHECK: @brev_ptr_inc
   8 // CHECK-DAG: llvm.hexagon.L2.loadri.pbr
   9 // CHECK-DAG: getelementptr inbounds nuw i8, {{.*}}i32 4
  10 // CHECK-NOT: getelementptr inbounds nuw i8, {{.*}}i32 8
  11 // CHECK-NOT: getelementptr inbounds nuw i8, {{.*}}i32 4
  12 int brev_ptr_inc(int A[], int B[]) {
  13   int *p0 = &B[0];
  14   int *p1 = &A[0];
  15   __builtin_brev_ldw(p0, &*p1++, 8);
  16   return (*p1);
  17 }
  18
  19 // The return value should return the value in A[0].
  20 // CHECK: @brev_ptr_dec
  21 // CHECK: llvm.hexagon.L2.loadri.pbr
  22 // CHECK: [[RET:%[0-9]+]] = load{{.*}}%A
  23 // CHECK: ret{{.*}}[[RET]]
  24 int brev_ptr_dec(int A[], int B[]) {
  25   int *p0 = &B[0];
  26   int *p1 = &A[1];
  27   __builtin_brev_ldw(p0, &*p1--, 8);
  28   return (*p1);
  29 }
  30
  31 // The store in bitcode needs to be of width correspondng to 16-bit.
  32 // CHECK: @brev_ptr_half
  33 // CHECK: llvm.hexagon.L2.loadrh.pbr
  34 // CHECK: store{{.*}}i16{{.*}}ptr
  35 short int brev_ptr_half(short int A[], short int B[]) {
  36   short int *p0 = &B[0];
  37   short int *p1 = &A[0];
  38   __builtin_brev_ldh(p0, &*p1++, 8);
  39   return (*p1);
  40 }
  41
  42 // The store in bitcode needs to be of width correspondng to 8-bit.
  43 // CHECK: @brev_ptr_byte
  44 // CHECK: llvm.hexagon.L2.loadrub.pbr
  45 // CHECK: store{{.*}}i8{{.*}}ptr
  46 unsigned char brev_ptr_byte(unsigned char A[], unsigned char B[]) {
  47   unsigned char *p0 = &B[0];
  48   unsigned char *p1 = &A[0];
  49   __builtin_brev_ldub(p0, &*p1++, 8);
  50   return (*p1);
  51 }
  52