fd739804e0
For a default visibility external linkage definition, dso_local is set for ELF
-fno-pic/-fpie and COFF and Mach-O. Since default clang -cc1 for ELF is similar
to -fpic ("PIC Level" is not set), this nuance causes unneeded binary format differences.
To make emitted IR similar, ELF -cc1 -fpic will default to -fno-semantic-interposition,
which sets dso_local for default visibility external linkage definitions.
To make this flip smooth and enable future (dso_local as definition default),
this patch replaces (function) `define ` with `define{{.*}} `,
(variable/constant/alias) `= ` with `={{.*}} `, or inserts appropriate `{{.*}} `.
23 lines
1.3 KiB
C++
23 lines
1.3 KiB
C++
// RUN: %clang_cc1 -triple x86_64-linux-gnu -emit-llvm -o - %s -fsanitize=function -fno-sanitize-recover=all | FileCheck %s
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// CHECK-LABEL: define{{.*}} void @_Z3funv() #0 prologue <{ i32, i32 }> <{ i32 846595819, i32 trunc (i64 sub (i64 ptrtoint (i8** @0 to i64), i64 ptrtoint (void ()* @_Z3funv to i64)) to i32) }> {
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void fun() {}
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// CHECK-LABEL: define{{.*}} void @_Z6callerPFvvE(void ()* %f)
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// CHECK: getelementptr <{ i32, i32 }>, <{ i32, i32 }>* {{.*}}, i32 0, i32 0, !nosanitize
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// CHECK: load i32, i32* {{.*}}, align {{.*}}, !nosanitize
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// CHECK: icmp eq i32 {{.*}}, 846595819, !nosanitize
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// CHECK: br i1 {{.*}}, label %[[LABEL1:.*]], label %[[LABEL4:.*]], !nosanitize
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// CHECK: [[LABEL1]]:
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// CHECK: getelementptr <{ i32, i32 }>, <{ i32, i32 }>* {{.*}}, i32 0, i32 1, !nosanitize
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// CHECK: load i32, i32* {{.*}}, align {{.*}}, !nosanitize
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// CHECK: icmp eq i8* {{.*}}, bitcast ({ i8*, i8* }* @_ZTIFvvE to i8*), !nosanitize
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// CHECK: br i1 {{.*}}, label %[[LABEL3:.*]], label %[[LABEL2:[^,]*]], {{.*}}!nosanitize
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// CHECK: [[LABEL2]]:
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// CHECK: call void @__ubsan_handle_function_type_mismatch_v1_abort(i8* {{.*}}, i64 {{.*}}, i64 {{.*}}, i64 {{.*}}) #{{.*}}, !nosanitize
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// CHECK-NOT: unreachable
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// CHECK: br label %[[LABEL3]], !nosanitize
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// CHECK: [[LABEL3]]:
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// CHECK: br label %[[LABEL4]], !nosanitize
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void caller(void (*f)()) { f(); }
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