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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 `{{.*}} `.
41 lines
1.4 KiB
C
41 lines
1.4 KiB
C
// RUN: %clang_cc1 -triple i386-pc-linux-gnu -DBITCODE -emit-llvm-bc -o %t.bc %s
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// RUN: %clang_cc1 -triple i386-pc-linux-gnu -DBITCODE2 -emit-llvm-bc -o %t-2.bc %s
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// RUN: %clang_cc1 -triple i386-pc-linux-gnu -mlink-bitcode-file %t.bc \
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// RUN: -O3 -emit-llvm -o - %s | FileCheck -check-prefix=CHECK-NO-BC %s
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// RUN: %clang_cc1 -triple i386-pc-linux-gnu -O3 -emit-llvm -o - \
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// RUN: -mlink-bitcode-file %t.bc -mlink-bitcode-file %t-2.bc %s \
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// RUN: | FileCheck -check-prefix=CHECK-NO-BC -check-prefix=CHECK-NO-BC2 %s
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// RUN: not %clang_cc1 -triple i386-pc-linux-gnu -DBITCODE -O3 -emit-llvm -o - \
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// RUN: -mlink-bitcode-file %t.bc %s 2>&1 | FileCheck -check-prefix=CHECK-BC %s
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// Make sure we deal with failure to load the file.
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// RUN: not %clang_cc1 -triple i386-pc-linux-gnu -mlink-bitcode-file no-such-file.bc \
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// RUN: -emit-llvm -o - %s 2>&1 | FileCheck -check-prefix=CHECK-NO-FILE %s
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int f(void);
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#ifdef BITCODE
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extern int f2(void);
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// CHECK-BC: fatal error: cannot link module {{.*}}'f': symbol multiply defined
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int f(void) {
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f2();
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return 42;
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}
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#elif BITCODE2
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int f2(void) { return 43; }
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#else
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// CHECK-NO-BC-LABEL: define{{.*}} i32 @g
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// CHECK-NO-BC: ret i32 42
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int g(void) {
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return f();
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}
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// CHECK-NO-BC-LABEL: define{{.*}} i32 @f
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// CHECK-NO-BC2-LABEL: define{{.*}} i32 @f2
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#endif
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// CHECK-NO-FILE: fatal error: cannot open file 'no-such-file.bc'
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