[llvm] [DirectX] Legalize i8 allocas (PR #137399)

[Finn Plummer via llvm-commits]

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@@ -0,0 +1,99 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
+; RUN: opt -S -passes='dxil-legalize' -mtriple=dxil-pc-shadermodel6.3-library %s | FileCheck %s
+
+define void @const_i8_store() {
+; CHECK-LABEL: define void @const_i8_store() {
+; CHECK-NEXT:    [[ACCUM_I_FLAT:%.*]] = alloca [1 x i32], align 4
+; CHECK-NEXT:    [[TMP1:%.*]] = alloca i32, align 4
+; CHECK-NEXT:    store i32 1, ptr [[TMP1]], align 4
+; CHECK-NEXT:    [[TMP2:%.*]] = load i32, ptr [[TMP1]], align 4
+; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i32, ptr [[ACCUM_I_FLAT]], i32 0
+; CHECK-NEXT:    store i32 [[TMP2]], ptr [[GEP]], align 4
+; CHECK-NEXT:    ret void
+;
+  %accum.i.flat = alloca [1 x i32], align 4
+  %i = alloca i8, align 4
+  store i8 1, ptr %i
+  %i8.load = load i8, ptr %i
+  %z = zext i8 %i8.load to i32
+  %gep = getelementptr i32, ptr %accum.i.flat, i32 0
+  store i32 %z, ptr %gep, align 4
+  ret void
+}
+
+define void @const_add_i8_store() {
+; CHECK-LABEL: define void @const_add_i8_store() {
+; CHECK-NEXT:    [[ACCUM_I_FLAT:%.*]] = alloca [1 x i32], align 4
+; CHECK-NEXT:    [[TMP1:%.*]] = alloca i32, align 4
+; CHECK-NEXT:    store i32 4, ptr [[TMP1]], align 4
+; CHECK-NEXT:    [[TMP2:%.*]] = load i32, ptr [[TMP1]], align 4
+; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i32, ptr [[ACCUM_I_FLAT]], i32 0
+; CHECK-NEXT:    store i32 [[TMP2]], ptr [[GEP]], align 4
+; CHECK-NEXT:    ret void
+;
+  %accum.i.flat = alloca [1 x i32], align 4
+  %i = alloca i8, align 4
+  %add_i8 = add nsw i8 3, 1
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inbelic wrote:

Ah okay, I see now thanks

https://github.com/llvm/llvm-project/pull/137399