[clang] Switch DirectX Target to use the Itanium ABI (PR #111632)

[Greg Roth via cfe-commits]

================
@@ -1,93 +1,96 @@
-// RUN: %clang_cc1 -std=hlsl2021 -finclude-default-header -x hlsl -triple \
-// RUN:   dxil-pc-shadermodel6.3-library %s -fnative-half-type \
-// RUN:   -emit-llvm -disable-llvm-passes -o - | FileCheck %s \ 
-// RUN:   --check-prefixes=CHECK,NATIVE_HALF
-// RUN: %clang_cc1 -std=hlsl2021 -finclude-default-header -x hlsl -triple \
-// RUN:   dxil-pc-shadermodel6.3-library %s -emit-llvm -disable-llvm-passes \
-// RUN:   -o - | FileCheck %s --check-prefixes=CHECK,NO_HALF
+// RUN: %clang_cc1 -finclude-default-header -triple dxil-pc-shadermodel6.3-library %s \
+// RUN:  -fnative-half-type -emit-llvm -disable-llvm-passes -o - | \
+// RUN:  FileCheck %s --check-prefixes=CHECK,NATIVE_HALF
+// RUN: %clang_cc1 -finclude-default-header -triple dxil-pc-shadermodel6.3-library %s \
+// RUN:  -emit-llvm -disable-llvm-passes -o - | \
+// RUN:  FileCheck %s --check-prefixes=CHECK,NO_HALF
 
 using hlsl::abs;
 
 #ifdef __HLSL_ENABLE_16_BIT
-// NATIVE_HALF: define noundef i16 @
+// NATIVE_HALF-LABEL: define noundef i16 @_Z16test_abs_int16_t
----------------
pow2clk wrote:

There was a lot of inconsistency in these sorts of checks. Some included more and some less. I tried to include enough to unambiguously identify the function in question.

https://github.com/llvm/llvm-project/pull/111632