r365706 - GodeGen, NFC: Add test to track emitStoresForConstant behavior
Vitaly Buka via cfe-commits
cfe-commits at lists.llvm.org
Wed Jul 10 15:47:07 PDT 2019
Author: vitalybuka
Date: Wed Jul 10 15:47:07 2019
New Revision: 365706
URL: http://llvm.org/viewvc/llvm-project?rev=365706&view=rev
Log:
GodeGen, NFC: Add test to track emitStoresForConstant behavior
Reviewers: eugenis, pcc
Reviewed By: eugenis
Subscribers: cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D64385
Added:
cfe/trunk/test/CodeGen/init-memset.c
Added: cfe/trunk/test/CodeGen/init-memset.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/init-memset.c?rev=365706&view=auto
==============================================================================
--- cfe/trunk/test/CodeGen/init-memset.c (added)
+++ cfe/trunk/test/CodeGen/init-memset.c Wed Jul 10 15:47:07 2019
@@ -0,0 +1,66 @@
+// RUN: %clang_cc1 -triple x86_64-unknown-unknown -O0 -emit-llvm -o - %s | FileCheck %s
+
+void use(void *);
+
+void test_small() {
+ // CHECK-LABEL: define void @test_small()
+ int a[] = {1, 2, 3, 4};
+ // CHECK: call void @llvm.memcpy.{{.*}}
+ use(a);
+}
+
+void test_small_same() {
+ // CHECK-LABEL: define void @test_small_same()
+ char a[] = {'a', 'a', 'a', 'a'};
+ // CHECK: call void @llvm.memcpy.{{.*}}
+ use(a);
+}
+
+void test_different() {
+ // CHECK-LABEL: define void @test_different()
+ int a[] = {1, 2, 3, 4, 5, 6, 7, 8, 9};
+ // CHECK: call void @llvm.memcpy.{{.*}}
+ use(a);
+}
+
+void test_all_zeros() {
+ // CHECK-LABEL: define void @test_all_zeros()
+ int a[16] = {};
+ // CHECK: call void @llvm.memset.{{.*}}
+ use(a);
+}
+
+void test_all_a() {
+ // CHECK-LABEL: define void @test_all_a()
+ char a[] = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
+ // CHECK: call void @llvm.memcpy.{{.*}}
+ use(a);
+}
+
+void test_most_zeros() {
+ // CHECK-LABEL: define void @test_most_zeros()
+ int a[16] = {0, 0, 1};
+ // CHECK: call void @llvm.memset.{{.*}}
+ // CHECK: store i32 1
+ use(a);
+}
+
+void test_most_a() {
+ // CHECK-LABEL: define void @test_most_a()
+ char a[] = "aaaaazaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
+ // CHECK: call void @llvm.memcpy.{{.*}}
+ use(a);
+}
+
+void test_pointers() {
+ // CHECK-LABEL: define void @test_pointers()
+ void *a[] = {&use, &use, &use, &use, &use, &use};
+ // CHECK: call void @llvm.memset.{{.*}}
+ // CHECK: store i8*
+ // CHECK: store i8*
+ // CHECK: store i8*
+ // CHECK: store i8*
+ // CHECK: store i8*
+ // CHECK: store i8*
+ use(a);
+}
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