xbolva00 updated this revision to Diff 214940.
xbolva00 added a comment.
Explicit memcpy
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D66173/new/
https://reviews.llvm.org/D66173
Files:
test/CodeGen/struct-copy.c
Index: test/CodeGen/struct-copy.c
===================================================================
--- test/CodeGen/struct-copy.c
+++ test/CodeGen/struct-copy.c
@@ -1,7 +1,39 @@
-// RUN: %clang_cc1 -emit-llvm %s -o - | grep 'call.*llvm.memcpy'
+// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py
+// RUN: %clang_cc1 -emit-llvm %s -o - | FileCheck %s
struct x { int a[100]; };
-
+// CHECK-LABEL: @foo(
+// CHECK-NEXT: entry:
+// CHECK-NEXT: [[P_ADDR:%.*]] = alloca %struct.x*, align 8
+// CHECK-NEXT: [[Q_ADDR:%.*]] = alloca %struct.x*, align 8
+// CHECK-NEXT: store %struct.x* [[P:%.*]], %struct.x** [[P_ADDR]], align 8
+// CHECK-NEXT: store %struct.x* [[Q:%.*]], %struct.x** [[Q_ADDR]], align 8
+// CHECK-NEXT: [[TMP0:%.*]] = load %struct.x*, %struct.x** [[P_ADDR]],
align 8
+// CHECK-NEXT: [[TMP1:%.*]] = load %struct.x*, %struct.x** [[Q_ADDR]],
align 8
+// CHECK-NEXT: [[TMP2:%.*]] = bitcast %struct.x* [[TMP0]] to i8*
+// CHECK-NEXT: [[TMP3:%.*]] = bitcast %struct.x* [[TMP1]] to i8*
+// CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 [[TMP2]],
i8* align 4 [[TMP3]], i64 400, i1 false)
+// CHECK-NEXT: ret void
+//
void foo(struct x *P, struct x *Q) {
*P = *Q;
}
+
+// CHECK-LABEL: @bar(
+// CHECK-NEXT: entry:
+// CHECK-NEXT: [[P_ADDR:%.*]] = alloca %struct.x*, align 8
+// CHECK-NEXT: [[Q_ADDR:%.*]] = alloca %struct.x*, align 8
+// CHECK-NEXT: store %struct.x* [[P:%.*]], %struct.x** [[P_ADDR]], align 8
+// CHECK-NEXT: store %struct.x* [[Q:%.*]], %struct.x** [[Q_ADDR]], align 8
+// CHECK-NEXT: [[TMP0:%.*]] = load %struct.x*, %struct.x** [[P_ADDR]],
align 8
+// CHECK-NEXT: [[TMP1:%.*]] = bitcast %struct.x* [[TMP0]] to i8*
+// CHECK-NEXT: [[TMP2:%.*]] = load %struct.x*, %struct.x** [[Q_ADDR]],
align 8
+// CHECK-NEXT: [[TMP3:%.*]] = bitcast %struct.x* [[TMP2]] to i8*
+// CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 [[TMP1]],
i8* align 4 [[TMP3]], i64 400, i1 false)
+// CHECK-NEXT: ret void
+//
+void bar(struct x *P, struct x *Q) {
+ __builtin_memcpy(P, Q, sizeof(struct x));
+}
+
+// CHECK: declare void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias nocapture
writeonly, i8* noalias nocapture readonly, i64, i1 immarg)
Index: test/CodeGen/struct-copy.c
===================================================================
--- test/CodeGen/struct-copy.c
+++ test/CodeGen/struct-copy.c
@@ -1,7 +1,39 @@
-// RUN: %clang_cc1 -emit-llvm %s -o - | grep 'call.*llvm.memcpy'
+// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py
+// RUN: %clang_cc1 -emit-llvm %s -o - | FileCheck %s
struct x { int a[100]; };
-
+// CHECK-LABEL: @foo(
+// CHECK-NEXT: entry:
+// CHECK-NEXT: [[P_ADDR:%.*]] = alloca %struct.x*, align 8
+// CHECK-NEXT: [[Q_ADDR:%.*]] = alloca %struct.x*, align 8
+// CHECK-NEXT: store %struct.x* [[P:%.*]], %struct.x** [[P_ADDR]], align 8
+// CHECK-NEXT: store %struct.x* [[Q:%.*]], %struct.x** [[Q_ADDR]], align 8
+// CHECK-NEXT: [[TMP0:%.*]] = load %struct.x*, %struct.x** [[P_ADDR]], align 8
+// CHECK-NEXT: [[TMP1:%.*]] = load %struct.x*, %struct.x** [[Q_ADDR]], align 8
+// CHECK-NEXT: [[TMP2:%.*]] = bitcast %struct.x* [[TMP0]] to i8*
+// CHECK-NEXT: [[TMP3:%.*]] = bitcast %struct.x* [[TMP1]] to i8*
+// CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 [[TMP2]], i8* align 4 [[TMP3]], i64 400, i1 false)
+// CHECK-NEXT: ret void
+//
void foo(struct x *P, struct x *Q) {
*P = *Q;
}
+
+// CHECK-LABEL: @bar(
+// CHECK-NEXT: entry:
+// CHECK-NEXT: [[P_ADDR:%.*]] = alloca %struct.x*, align 8
+// CHECK-NEXT: [[Q_ADDR:%.*]] = alloca %struct.x*, align 8
+// CHECK-NEXT: store %struct.x* [[P:%.*]], %struct.x** [[P_ADDR]], align 8
+// CHECK-NEXT: store %struct.x* [[Q:%.*]], %struct.x** [[Q_ADDR]], align 8
+// CHECK-NEXT: [[TMP0:%.*]] = load %struct.x*, %struct.x** [[P_ADDR]], align 8
+// CHECK-NEXT: [[TMP1:%.*]] = bitcast %struct.x* [[TMP0]] to i8*
+// CHECK-NEXT: [[TMP2:%.*]] = load %struct.x*, %struct.x** [[Q_ADDR]], align 8
+// CHECK-NEXT: [[TMP3:%.*]] = bitcast %struct.x* [[TMP2]] to i8*
+// CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 [[TMP1]], i8* align 4 [[TMP3]], i64 400, i1 false)
+// CHECK-NEXT: ret void
+//
+void bar(struct x *P, struct x *Q) {
+ __builtin_memcpy(P, Q, sizeof(struct x));
+}
+
+// CHECK: declare void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias nocapture writeonly, i8* noalias nocapture readonly, i64, i1 immarg)
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