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.
51 lines
2.0 KiB
C++
51 lines
2.0 KiB
C++
// RUN: %clang_cc1 -triple=x86_64-apple-darwin -emit-llvm -o - %s | FileCheck %s
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// rdar://11861085
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struct s {
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char filler [128];
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volatile int x;
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};
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struct s gs;
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void foo (void) {
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struct s ls;
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ls = ls;
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gs = gs;
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ls = gs;
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}
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// CHECK-LABEL: define{{.*}} void @_Z3foov()
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// CHECK: %[[LS:.*]] = alloca %struct.s, align 4
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// CHECK-NEXT: %[[ZERO:.*]] = bitcast %struct.s* %[[LS]] to i8*
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// CHECK-NEXT: %[[ONE:.*]] = bitcast %struct.s* %[[LS]] to i8*
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// CHECK-NEXT: call void @llvm.memcpy.{{.*}}(i8* align 4 %[[ZERO]], i8* align 4 %[[ONE]], i64 132, i1 true)
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// CHECK-NEXT: call void @llvm.memcpy.{{.*}}(i8* align 4 getelementptr inbounds (%struct.s, %struct.s* @gs, i32 0, i32 0, i32 0), i8* align 4 getelementptr inbounds (%struct.s, %struct.s* @gs, i32 0, i32 0, i32 0), i64 132, i1 true)
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// CHECK-NEXT: %[[TWO:.*]] = bitcast %struct.s* %[[LS]] to i8*
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// CHECK-NEXT: call void @llvm.memcpy.{{.*}}(i8* align 4 %[[TWO]], i8* align 4 getelementptr inbounds (%struct.s, %struct.s* @gs, i32 0, i32 0, i32 0), i64 132, i1 true)
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struct s1 {
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struct s y;
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};
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struct s1 s;
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void fee (void) {
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s = s;
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s.y = gs;
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}
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// CHECK-LABEL: define{{.*}} void @_Z3feev()
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// CHECK: call void @llvm.memcpy.{{.*}}(i8* align 4 getelementptr inbounds (%struct.s1, %struct.s1* @s, i32 0, i32 0, i32 0, i32 0), i8* align 4 getelementptr inbounds (%struct.s1, %struct.s1* @s, i32 0, i32 0, i32 0, i32 0), i64 132, i1 true)
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// CHECK-NEXT: call void @llvm.memcpy.{{.*}}(i8* align 4 getelementptr inbounds (%struct.s1, %struct.s1* @s, i32 0, i32 0, i32 0, i32 0), i8* align 4 getelementptr inbounds (%struct.s, %struct.s* @gs, i32 0, i32 0, i32 0), i64 132, i1 true)
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struct d : s1 {
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};
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d gd;
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void gorf(void) {
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gd = gd;
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}
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// CHECK-LABEL: define{{.*}} void @_Z4gorfv()
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// CHECK: call void @llvm.memcpy.{{.*}}(i8* align 4 getelementptr inbounds (%struct.d, %struct.d* @gd, i32 0, i32 0, i32 0, i32 0, i32 0), i8* align 4 getelementptr inbounds (%struct.d, %struct.d* @gd, i32 0, i32 0, i32 0, i32 0, i32 0), i64 132, i1 true)
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