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.
36 lines
822 B
C++
36 lines
822 B
C++
// RUN: %clang_cc1 -x c++ -triple x86_64-apple-darwin10 -emit-llvm -o - %s -fsanitize=nullability-assign | FileCheck %s
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struct S1 {
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int *_Nonnull p;
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};
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struct S2 {
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S1 s1;
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};
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union U1 {
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S1 s1;
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S2 s2;
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};
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// CHECK-LABEL: define{{.*}} void @{{.*}}f1
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void f1(int *p) {
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U1 u;
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// CHECK: [[ICMP:%.*]] = icmp ne i32* {{.*}}, null, !nosanitize
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// CHECK-NEXT: br i1 [[ICMP]], {{.*}}, !nosanitize
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// CHECK: call void @__ubsan_handle_type_mismatch{{.*}} !nosanitize
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// CHECK: store
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u.s1.p = p;
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// CHECK: [[ICMP:%.*]] = icmp ne i32* {{.*}}, null, !nosanitize
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// CHECK-NEXT: br i1 [[ICMP]], {{.*}}, !nosanitize
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// CHECK: call void @__ubsan_handle_type_mismatch{{.*}} !nosanitize
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// CHECK: store
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u.s2.s1.p = p;
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// CHECK-NOT: __ubsan_handle_type_mismatch
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// CHECK-NOT: store
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// CHECK: ret void
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}
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