[PATCH] D133488: [clang][PowerPC][NFC] Add base test case for PPC64 VAArg aggregate smaller than a slot

[Ting Wang via Phabricator via cfe-commits]

tingwang created this revision.
tingwang added reviewers: uweigand, wschmidt, PowerPC.
tingwang added a project: clang.
Herald added subscribers: shchenz, kbarton, nemanjai.
Herald added a project: All.
tingwang requested review of this revision.
Herald added a subscriber: cfe-commits.

Add base test case for https://reviews.llvm.org/D133338.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D133488

Files:
  clang/test/CodeGen/PowerPC/ppc64-align-struct.c


Index: clang/test/CodeGen/PowerPC/ppc64-align-struct.c
===================================================================
--- clang/test/CodeGen/PowerPC/ppc64-align-struct.c
+++ clang/test/CodeGen/PowerPC/ppc64-align-struct.c
@@ -9,6 +9,7 @@
 struct test5 { int x[17]; };
 struct test6 { int x[17]; } __attribute__((aligned (16)));
 struct test7 { int x[17]; } __attribute__((aligned (32)));
+struct test8 { char x; };
 
 // CHECK: define{{.*}} void @test1(i32 noundef signext %x, i64 %y.coerce)
 void test1 (int x, struct test1 y)
@@ -128,6 +129,25 @@
   return y;
 }
 
+// Error pattern will be fixed in https://reviews.llvm.org/D133338
+// CHECK: define{{.*}} void @test8va(%struct.test8* noalias sret(%struct.test8) align 1 %[[AGG_RESULT:.*]], i32 noundef signext %x, ...)
+// CHECK: %[[CUR:[^ ]+]] = load i8*, i8** %ap
+// CHECK: %[[NEXT:[^ ]+]] = getelementptr inbounds i8, i8* %[[CUR]], i64 8
+// CHECK: store i8* %[[NEXT]], i8** %ap
+// CHECK: [[T0:%.*]] = bitcast i8* %[[CUR]] to %struct.test8*
+// CHECK: [[DEST:%.*]] = bitcast %struct.test8* %[[AGG_RESULT]] to i8*
+// CHECK: [[SRC:%.*]] = bitcast %struct.test8* [[T0]] to i8*
+// CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 1 [[DEST]], i8* align 8 [[SRC]], i64 1, i1 false)
+struct test8 test8va (int x, ...)
+{
+  struct test8 y;
+  va_list ap;
+  va_start(ap, x);
+  y = va_arg (ap, struct test8);
+  va_end(ap);
+  return y;
+}
+
 // CHECK: define{{.*}} void @testva_longdouble(%struct.test_longdouble* noalias sret(%struct.test_longdouble) align 16 %[[AGG_RESULT:.*]], i32 noundef signext %x, ...)
 // CHECK: %[[CUR:[^ ]+]] = load i8*, i8** %ap
 // CHECK: %[[NEXT:[^ ]+]] = getelementptr inbounds i8, i8* %[[CUR]], i64 16


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