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 `{{.*}} `.
23 lines
861 B
C++
23 lines
861 B
C++
// RUN: %clang_cc1 -triple i386-unknown-unknown -fexceptions -emit-llvm %s -o - | FileCheck %s
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int c(void) __attribute__((const));
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int p(void) __attribute__((pure));
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int t(void);
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// CHECK: define{{.*}} i32 @_Z1fv() [[TF:#[0-9]+]] {
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int f(void) {
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// CHECK: call i32 @_Z1cv() [[NUW_RN_CALL:#[0-9]+]]
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// CHECK: call i32 @_Z1pv() [[NUW_RO_CALL:#[0-9]+]]
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return c() + p() + t();
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}
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// CHECK: declare i32 @_Z1cv() [[NUW_RN:#[0-9]+]]
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// CHECK: declare i32 @_Z1pv() [[NUW_RO:#[0-9]+]]
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// CHECK: declare i32 @_Z1tv() [[TF2:#[0-9]+]]
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// CHECK: attributes [[TF]] = { {{.*}} }
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// CHECK: attributes [[NUW_RN]] = { nounwind readnone{{.*}} }
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// CHECK: attributes [[NUW_RO]] = { nounwind readonly{{.*}} }
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// CHECK: attributes [[TF2]] = { {{.*}} }
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// CHECK: attributes [[NUW_RN_CALL]] = { nounwind readnone }
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// CHECK: attributes [[NUW_RO_CALL]] = { nounwind readonly }
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