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fd739804e0
For a default visibility external linkage definition, dso_local is set for ELF
-fno-pic/-fpie and COFF and Mach-O. Since default clang -cc1 for ELF is similar
to -fpic ("PIC Level" is not set), this nuance causes unneeded binary format differences.
To make emitted IR similar, ELF -cc1 -fpic will default to -fno-semantic-interposition,
which sets dso_local for default visibility external linkage definitions.
To make this flip smooth and enable future (dso_local as definition default),
this patch replaces (function) `define ` with `define{{.*}} `,
(variable/constant/alias) `= ` with `={{.*}} `, or inserts appropriate `{{.*}} `.
67 lines
1.6 KiB
C
67 lines
1.6 KiB
C
// RUN: %clang_cc1 -triple x86_64-unknown-unknown -O0 -emit-llvm -o - %s | FileCheck %s
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void use(void *);
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void test_small() {
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// CHECK-LABEL: define{{.*}} void @test_small()
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int a[] = {1, 2, 3, 4};
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// CHECK: call void @llvm.memcpy.{{.*}}
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use(a);
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}
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void test_small_same() {
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// CHECK-LABEL: define{{.*}} void @test_small_same()
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char a[] = {'a', 'a', 'a', 'a'};
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// CHECK: call void @llvm.memcpy.{{.*}}
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use(a);
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}
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void test_different() {
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// CHECK-LABEL: define{{.*}} void @test_different()
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int a[] = {1, 2, 3, 4, 5, 6, 7, 8, 9};
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// CHECK: call void @llvm.memcpy.{{.*}}
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use(a);
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}
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void test_all_zeros() {
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// CHECK-LABEL: define{{.*}} void @test_all_zeros()
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int a[16] = {};
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// CHECK: call void @llvm.memset.{{.*}}
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use(a);
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}
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void test_all_a() {
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// CHECK-LABEL: define{{.*}} void @test_all_a()
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char a[] = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
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// CHECK: call void @llvm.memcpy.{{.*}}
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use(a);
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}
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void test_most_zeros() {
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// CHECK-LABEL: define{{.*}} void @test_most_zeros()
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int a[16] = {0, 0, 1};
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// CHECK: call void @llvm.memset.{{.*}}
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// CHECK: store i32 1
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use(a);
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}
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void test_most_a() {
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// CHECK-LABEL: define{{.*}} void @test_most_a()
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char a[] = "aaaaazaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
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// CHECK: call void @llvm.memcpy.{{.*}}
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use(a);
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}
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void test_pointers() {
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// CHECK-LABEL: define{{.*}} void @test_pointers()
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void *a[] = {&use, &use, &use, &use, &use, &use};
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// CHECK: call void @llvm.memset.{{.*}}
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// CHECK: store i8*
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// CHECK: store i8*
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// CHECK: store i8*
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// CHECK: store i8*
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// CHECK: store i8*
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// CHECK: store i8*
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use(a);
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}
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