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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 `{{.*}} `.
29 lines
650 B
C++
29 lines
650 B
C++
// RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm -o - %s | FileCheck %s
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struct s0 {
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int Start, End;
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unsigned Alignment;
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int TheStores __attribute__((aligned(16)));
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};
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// CHECK-LABEL: define{{.*}} void @f0
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// CHECK: alloca %struct.s0, align 16
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extern "C" void f0() {
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(void) s0();
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}
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// CHECK-LABEL: define{{.*}} void @f1
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// CHECK: alloca %struct.s0, align 16
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extern "C" void f1() {
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(void) (struct s0) { 0, 0, 0, 0 };
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}
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// CHECK-LABEL: define{{.*}} i32 @f2
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// CHECK: alloca %struct.s1, align 2
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struct s1 { short x; short y; };
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extern "C" struct s1 f2(int a, struct s1 *x, struct s1 *y) {
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if (a)
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return *x;
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return *y;
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}
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