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 `{{.*}} `.
45 lines
1.5 KiB
C
45 lines
1.5 KiB
C
// RUN: %clang_cc1 -Werror -triple i386-linux -emit-llvm -o - %s | FileCheck %s
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// Test that different order of declarations is acceptable and that
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// implementing different redeclarations is acceptable.
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// rdar://problem/34949329
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typedef union {
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int i;
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float f;
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} TU __attribute__((transparent_union));
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// CHECK-LABEL: define{{.*}} void @f0(i32 %tu.coerce)
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// CHECK: %tu = alloca %union.TU, align 4
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// CHECK: %coerce.dive = getelementptr inbounds %union.TU, %union.TU* %tu, i32 0, i32 0
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// CHECK: store i32 %tu.coerce, i32* %coerce.dive, align 4
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void f0(TU tu) {}
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void f0(int i);
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// CHECK-LABEL: define{{.*}} void @f1(i32 %tu.coerce)
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// CHECK: %tu = alloca %union.TU, align 4
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// CHECK: %coerce.dive = getelementptr inbounds %union.TU, %union.TU* %tu, i32 0, i32 0
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// CHECK: store i32 %tu.coerce, i32* %coerce.dive, align 4
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void f1(int i);
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void f1(TU tu) {}
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// CHECK-LABEL: define{{.*}} void @f2(i32 %i)
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// CHECK: %i.addr = alloca i32, align 4
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// CHECK: store i32 %i, i32* %i.addr, align 4
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void f2(TU tu);
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void f2(int i) {}
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// CHECK-LABEL: define{{.*}} void @f3(i32 %i)
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// CHECK: %i.addr = alloca i32, align 4
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// CHECK: store i32 %i, i32* %i.addr, align 4
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void f3(int i) {}
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void f3(TU tu);
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// Also test functions with parameters specified K&R style.
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// CHECK-LABEL: define{{.*}} void @knrStyle(i32 %tu.coerce)
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// CHECK: %tu = alloca %union.TU, align 4
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// CHECK: %coerce.dive = getelementptr inbounds %union.TU, %union.TU* %tu, i32 0, i32 0
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// CHECK: store i32 %tu.coerce, i32* %coerce.dive, align 4
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void knrStyle(int i);
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void knrStyle(tu) TU tu; {}
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