6b3351792c
For a definition (of most linkage types), dso_local is set for ELF -fno-pic/-fpie
and COFF, but not for Mach-O. This nuance causes unneeded binary format differences.
This patch replaces (function) `define ` with `define{{.*}} `,
(variable/constant/alias) `= ` with `={{.*}} `, or inserts appropriate `{{.*}} `
if there is an explicit linkage.
* Clang will set dso_local for Mach-O, which is currently implied by TargetMachine.cpp. This will make COFF/Mach-O and executable ELF similar.
* Eventually I hope we can make dso_local the textual LLVM IR default (write explicit "dso_preemptable" when applicable) and -fpic ELF will be similar to everything else. This patch helps move toward that goal.
28 lines
866 B
C
28 lines
866 B
C
// RUN: %clang_cc1 -triple x86_64-apple-macosx10.7.0 %s -emit-llvm -o - | FileCheck %s
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void t1() __attribute__((naked));
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// Basic functionality check
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// (Note that naked needs to imply noinline to work properly.)
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// CHECK: define{{.*}} void @t1() [[NAKED_OPTNONE:#[0-9]+]] {
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void t1()
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{
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}
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// Make sure this doesn't explode in the verifier.
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// (It doesn't really make sense, but it isn't invalid.)
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// CHECK: define{{.*}} void @t2() [[NAKED:#[0-9]+]] {
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__attribute((naked, always_inline)) void t2() {
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}
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// Make sure not to generate prolog or epilog for naked functions.
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__attribute((naked)) void t3(int x) {
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// CHECK: define{{.*}} void @t3(i32 %0)
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// CHECK-NOT: alloca
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// CHECK-NOT: store
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// CHECK: unreachable
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}
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// CHECK: attributes [[NAKED_OPTNONE]] = { naked noinline nounwind optnone{{.*}} }
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// CHECK: attributes [[NAKED]] = { naked noinline nounwind{{.*}} }
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