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.
37 lines
1.4 KiB
C++
37 lines
1.4 KiB
C++
// RUN: %clang_cc1 %s -std=c++11 -triple=x86_64-apple-darwin10 -emit-llvm -o - | FileCheck %s -check-prefixes=CHECK,NULL-INVALID
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// RUN: %clang_cc1 %s -std=c++11 -triple=x86_64-apple-darwin10 -fno-delete-null-pointer-checks -emit-llvm -o - | FileCheck %s -check-prefixes=CHECK,NULL-VALID
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// For a reference to a complete type, output the dereferenceable attribute (in
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// any address space).
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typedef int a __attribute__((address_space(1)));
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a & foo(a &x, a & y) {
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return x;
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}
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// CHECK: define{{.*}} align 4 dereferenceable(4) i32 addrspace(1)* @_Z3fooRU3AS1iS0_(i32 addrspace(1)* align 4 dereferenceable(4) %x, i32 addrspace(1)* align 4 dereferenceable(4) %y)
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// For a reference to an incomplete type in an alternate address space, output
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// neither dereferenceable nor nonnull.
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class bc;
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typedef bc b __attribute__((address_space(1)));
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b & bar(b &x, b & y) {
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return x;
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}
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// CHECK: define{{.*}} align 1 %class.bc addrspace(1)* @_Z3barRU3AS12bcS1_(%class.bc addrspace(1)* align 1 %x, %class.bc addrspace(1)* align 1 %y)
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// For a reference to an incomplete type in addrspace(0), output nonnull.
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bc & bar2(bc &x, bc & y) {
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return x;
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}
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// NULL-INVALID: define{{.*}} nonnull align 1 %class.bc* @_Z4bar2R2bcS0_(%class.bc* nonnull align 1 %x, %class.bc* nonnull align 1 %y)
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// NULL-VALID: define{{.*}} align 1 %class.bc* @_Z4bar2R2bcS0_(%class.bc* align 1 %x, %class.bc* align 1 %y)
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