[PATCH] D133668: [HLSL] Use _BitInt(16) for int16_t to avoid promote to int.

[Xiang Li via Phabricator via cfe-commits]

python3kgae updated this revision to Diff 468617.
python3kgae added a comment.

Switch back to short and disable integer promote for hlsl.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D133668/new/

https://reviews.llvm.org/D133668

Files:
  clang/lib/Sema/SemaExpr.cpp
  clang/test/CodeGenHLSL/basic_types.hlsl
  clang/test/CodeGenHLSL/builtins/abs.hlsl
  clang/test/CodeGenHLSL/int16_t_add.hlsl
  clang/test/SemaHLSL/BitInt128.hlsl


Index: clang/test/SemaHLSL/BitInt128.hlsl
===================================================================
--- /dev/null
+++ clang/test/SemaHLSL/BitInt128.hlsl
@@ -0,0 +1,7 @@
+// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.3-library -x hlsl -ast-dump -o - %s -verify
+
+// expected-error at +1 {{_BitInt is not supported on this target}}
+_BitInt(128) i128;
+
+// expected-error at +1 {{_BitInt is not supported on this target}}
+unsigned _BitInt(128) u128;
Index: clang/test/CodeGenHLSL/int16_t_add.hlsl
===================================================================
--- /dev/null
+++ clang/test/CodeGenHLSL/int16_t_add.hlsl
@@ -0,0 +1,24 @@
+// RUN: %clang_cc1 -finclude-default-header -x hlsl -triple \
+// RUN:   dxil-pc-shadermodel6.3-library %s -D__HLSL_ENABLE_16_BIT \
+// RUN:   -emit-llvm -disable-llvm-passes -O3 -o - | FileCheck %s
+
+// Make sure generate i16 add.
+// CHECK: add nsw i16 %
+int16_t add(int16_t a, int16_t b) {
+  return a + b;
+}
+// CHECK: define noundef <2 x i16> @
+// CHECK: add <2 x i16>
+int16_t2 add(int16_t2 a, int16_t2 b) {
+  return a + b;
+}
+// CHECK: define noundef <3 x i16> @
+// CHECK: add <3 x i16>
+int16_t3 add(int16_t3 a, int16_t3 b) {
+  return a + b;
+}
+// CHECK: define noundef <4 x i16> @
+// CHECK: add <4 x i16>
+int16_t4 add(int16_t4 a, int16_t4 b) {
+  return a + b;
+}
Index: clang/test/CodeGenHLSL/builtins/abs.hlsl
===================================================================
--- clang/test/CodeGenHLSL/builtins/abs.hlsl
+++ clang/test/CodeGenHLSL/builtins/abs.hlsl
@@ -7,8 +7,7 @@
 
 
 // CHECK: define noundef signext i16 @
-// FIXME: int16_t is promoted to i32 now. Change to abs.i16 once it is fixed.
-// CHECK: call i32 @llvm.abs.i32(
+// CHECK: call i16 @llvm.abs.i16(
 int16_t test_abs_int16_t ( int16_t p0 ) {
   return abs ( p0 );
 }
Index: clang/test/CodeGenHLSL/basic_types.hlsl
===================================================================
--- clang/test/CodeGenHLSL/basic_types.hlsl
+++ clang/test/CodeGenHLSL/basic_types.hlsl
@@ -4,7 +4,7 @@
 
 
 // CHECK:"?uint16_t_Val@@3GA" = global i16 0, align 2
-// CHECK:"?int16_t_Val@@3FA" = global i16 0, align 2
+// CHECK:"?int16_t_Val@@3FA" = global i16 0
 // CHECK:"?uint_Val@@3IA" = global i32 0, align 4
 // CHECK:"?uint64_t_Val@@3KA" = global i64 0, align 8
 // CHECK:"?int64_t_Val@@3JA" = global i64 0, align 8
Index: clang/lib/Sema/SemaExpr.cpp
===================================================================
--- clang/lib/Sema/SemaExpr.cpp
+++ clang/lib/Sema/SemaExpr.cpp
@@ -837,7 +837,9 @@
       E = ImpCastExprToType(E, PTy, CK_IntegralCast).get();
       return E;
     }
-    if (Ty->isPromotableIntegerType()) {
+    if (Ty->isPromotableIntegerType() &&
+        // Avoid promote integer type to int.
+        !getLangOpts().HLSL) {
       QualType PT = Context.getPromotedIntegerType(Ty);
       E = ImpCastExprToType(E, PT, CK_IntegralCast).get();
       return E;


-------------- next part --------------
A non-text attachment was scrubbed...
Name: D133668.468617.patch
Type: text/x-patch
Size: 2921 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/cfe-commits/attachments/20221018/3c040351/attachment.bin>