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 `{{.*}} `.
26 lines
1012 B
C
26 lines
1012 B
C
// Check the correct function attributes are generated
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// RUN: %clang_cc1 -triple x86_64-linux -O0 -S -emit-llvm -o- %s -fstack-clash-protection | FileCheck %s
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// RUN: %clang_cc1 -triple s390x-linux-gnu -O0 -S -emit-llvm -o- %s -fstack-clash-protection | FileCheck %s
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// RUN: %clang_cc1 -triple powerpc64le-linux-gnu -O0 -S -emit-llvm -o- %s -fstack-clash-protection | FileCheck %s
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// RUN: %clang_cc1 -triple powerpc64-linux-gnu -O0 -S -emit-llvm -o- %s -fstack-clash-protection | FileCheck %s
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// CHECK: define{{.*}} void @large_stack() #[[A:.*]] {
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void large_stack() {
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volatile int stack[20000], i;
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for (i = 0; i < sizeof(stack) / sizeof(int); ++i)
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stack[i] = i;
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}
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// CHECK: define{{.*}} void @vla({{.*}}) #[[A:.*]] {
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void vla(int n) {
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volatile int vla[n];
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__builtin_memset(&vla[0], 0, 1);
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}
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// CHECK: define{{.*}} void @builtin_alloca({{.*}}) #[[A:.*]] {
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void builtin_alloca(int n) {
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volatile void *mem = __builtin_alloca(n);
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}
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// CHECK: attributes #[[A]] = {{.*}} "probe-stack"="inline-asm"
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