clang/test/CodeGenCXX/poly-unsigned.cpp

   1 // RUN: %clang_cc1 -triple arm64-apple-ios -target-feature +neon -ffreestanding -S -emit-llvm -o - %s | FileCheck --check-prefix=CHECK-UNSIGNED-POLY %s
   2 // RUN: %clang_cc1 -triple arm64-linux-gnu -target-feature +neon -ffreestanding -S -emit-llvm -o - %s | FileCheck --check-prefix=CHECK-UNSIGNED-POLY %s
   3 // RUN: %clang_cc1 -triple armv7-apple-ios -ffreestanding -target-cpu cortex-a8 -S -emit-llvm -o - %s | FileCheck --check-prefix=CHECK-SIGNED-POLY %s
   4
   5 // REQUIRES: aarch64-registered-target || arm-registered-target
   6
   7 #include <arm_neon.h>
   8
   9 // Polynomial types really should be universally unsigned, otherwise casting
  10 // (say) poly8_t "x^7" to poly16_t would change it to "x^15 + x^14 + ... +
  11 // x^7". Unfortunately 32-bit ARM ended up in a slightly delicate ABI situation
  12 // so for now it got that wrong.
  13
  14 poly16_t test_poly8(poly8_t pIn) {
  15 // CHECK-UNSIGNED-POLY: @_Z10test_poly8h
  16 // CHECK-UNSIGNED-POLY: zext i8 {{.*}} to i16
  17
  18 // CHECK-SIGNED-POLY: @_Z10test_poly8a
  19 // CHECK-SIGNED-POLY: sext i8 {{.*}} to i16
  20
  21   return pIn;
  22 }