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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 `{{.*}} `.
34 lines
1.2 KiB
C++
34 lines
1.2 KiB
C++
// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm --std=c++17 %s -o - | FileCheck %s
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struct stream {
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friend const stream &operator<<(const stream &, const float &);
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};
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void foo() {
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constexpr float f_zero = 0.0f;
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constexpr float f_one = 1.0f;
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constexpr float f_two = 2.0f;
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stream s;
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[=]() {
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s << f_zero << f_one << f_two;
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}();
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}
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// CHECK: define{{.*}} void @_Z3foov
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// CHECK: getelementptr inbounds %{{.+}}, %{{.+}}* %{{.+}}, i32 0, i32 0
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// CHECK-NEXT: getelementptr inbounds %{{.+}}, %{{.+}}* %{{.+}}, i32 0, i32 1
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// CHECK-NEXT: store float 0.000
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// CHECK-NEXT: getelementptr inbounds %{{.+}}, %{{.+}}* %{{.+}}, i32 0, i32 2
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// CHECK-NEXT: store float 1.000
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// CHECK-NEXT: getelementptr inbounds %{{.+}}, %{{.+}}* %{{.+}}, i32 0, i32 3
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// CHECK-NEXT: store float 2.000
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// The lambda body. Reverse iteration when the captures aren't deterministic
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// causes these to be laid out differently in the lambda.
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// CHECK: define internal void
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// CHECK: getelementptr inbounds %{{.+}}, %{{.+}}* %{{.+}}, i32 0, i32 0
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// CHECK: getelementptr inbounds %{{.+}}, %{{.+}}* %{{.+}}, i32 0, i32 1
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// CHECK: getelementptr inbounds %{{.+}}, %{{.+}}* %{{.+}}, i32 0, i32 2
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// CHECK: getelementptr inbounds %{{.+}}, %{{.+}}* %{{.+}}, i32 0, i32 3
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