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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.
34 lines
943 B
C
34 lines
943 B
C
// RUN: %clang_cc1 -triple x86_64-apple-macosx10.14.0 -fsanitize=unsigned-integer-overflow %s -emit-llvm -o - | FileCheck %s
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_Atomic(unsigned) atomic;
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// CHECK-LABEL: define{{.*}} void @cmpd_assign
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void cmpd_assign() {
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// CHECK: br label %[[LOOP_START:.*]]
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// CHECK: [[LOOP_START]]:
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// CHECK-NEXT: phi i32 {{.*}}, [ {{.*}}, %[[INCOMING_BLOCK:.*]] ]
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// CHECK: [[INCOMING_BLOCK]]:
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// CHECK-NEXT: cmpxchg
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// CHECK-NEXT: extractvalue
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// CHECK-NEXT: extractvalue
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// CHECK-NEXT: br i1 %8, label %{{.*}}, label %[[LOOP_START]]
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atomic += 1;
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}
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// CHECK-LABEL: define{{.*}} void @inc
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void inc() {
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// CHECK: br label %[[LOOP_START:.*]]
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// CHECK: [[LOOP_START]]:
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// CHECK-NEXT: phi i32 {{.*}}, [ {{.*}}, %[[INCOMING_BLOCK:.*]] ]
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// CHECK: [[INCOMING_BLOCK]]:
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// CHECK-NEXT: cmpxchg
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// CHECK-NEXT: extractvalue
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// CHECK-NEXT: extractvalue
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// CHECK-NEXT: br i1 %8, label %{{.*}}, label %[[LOOP_START]]
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atomic++;
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}
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