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.
39 lines
1.5 KiB
C
39 lines
1.5 KiB
C
// RUN: %clang_cc1 -fno-experimental-new-pass-manager -emit-llvm -o - -triple x86_64-apple-darwin10 %s | FileCheck %s
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// RUN: %clang_cc1 -fno-experimental-new-pass-manager -O2 -fno-inline -emit-llvm -o - -triple x86_64-apple-darwin10 %s | FileCheck %s
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// RUN: %clang_cc1 -fno-experimental-new-pass-manager -flto -O2 -fno-inline -emit-llvm -o - -triple x86_64-apple-darwin10 %s | FileCheck %s -check-prefix=LTO
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// RUN: %clang_cc1 -fexperimental-new-pass-manager -emit-llvm -o - -triple x86_64-apple-darwin10 %s | FileCheck %s
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// RUN: %clang_cc1 -fexperimental-new-pass-manager -O2 -fno-inline -emit-llvm -o - -triple x86_64-apple-darwin10 %s | FileCheck %s
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// RUN: %clang_cc1 -fexperimental-new-pass-manager -flto -O2 -fno-inline -emit-llvm -o - -triple x86_64-apple-darwin10 %s | FileCheck %s -check-prefix=LTO
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// Ensure that we don't emit available_externally functions at -O0.
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// Also should not emit them at -O2, unless -flto is present in which case
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// we should preserve them for link-time inlining decisions.
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int x;
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inline void f0(int y) { x = y; }
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// CHECK-LABEL: define{{.*}} void @test()
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// CHECK: declare void @f0(i32)
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// LTO-LABEL: define{{.*}} void @test()
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// LTO: define available_externally void @f0
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void test() {
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f0(17);
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}
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inline int __attribute__((always_inline)) f1(int x) {
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int blarg = 0;
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for (int i = 0; i < x; ++i)
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blarg = blarg + x * i;
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return blarg;
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}
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// CHECK: @test1
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// LTO: @test1
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int test1(int x) {
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// CHECK-NOT: call {{.*}} @f1
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// CHECK: ret i32
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// LTO-NOT: call {{.*}} @f1
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// LTO: ret i32
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return f1(x);
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}
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