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
927 B
Objective-C
28 lines
927 B
Objective-C
// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -w -emit-llvm -o - %s -fsanitize=pointer-overflow | FileCheck %s
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// CHECK-LABEL: define{{.*}} void @variable_len_array_arith
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void variable_len_array_arith(int n, int k) {
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int vla[n];
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int (*p)[n] = &vla;
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// CHECK: getelementptr inbounds i32, i32* {{.*}}, i64 [[INC:%.*]]
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// CHECK: @llvm.smul.with.overflow.i64(i64 4, i64 [[INC]]), !nosanitize
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// CHECK-NOT: select
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// CHECK: call void @__ubsan_handle_pointer_overflow{{.*}}
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++p;
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// CHECK: getelementptr inbounds i32, i32* {{.*}}, i64 [[IDXPROM:%.*]]
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// CHECK: @llvm.smul.with.overflow.i64(i64 4, i64 [[IDXPROM]]), !nosanitize
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// CHECK: select
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// CHECK: call void @__ubsan_handle_pointer_overflow{{.*}}
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p + k;
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}
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// CHECK-LABEL: define{{.*}} void @objc_id
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void objc_id(id *p) {
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// CHECK: add i64 {{.*}}, 8, !nosanitize
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// CHECK-NOT: select
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// CHECK: @__ubsan_handle_pointer_overflow{{.*}}
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p++;
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}
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