6678f8e505
Information in the function `Prologue Data` is intentionally opaque. When a function with `Prologue Data` is duplicated. The self (global value) references inside `Prologue Data` is still pointing to the original function. This may cause errors like `fatal error: error in backend: Cannot represent a difference across sections`. This patch detaches the information from function `Prologue Data` and attaches it to a function metadata node. This and D116130 fix https://github.com/llvm/llvm-project/issues/49689. Reviewed By: pcc Differential Revision: https://reviews.llvm.org/D115844
26 lines
1.4 KiB
C++
26 lines
1.4 KiB
C++
// RUN: %clang_cc1 -no-opaque-pointers -triple x86_64-linux-gnu -emit-llvm -o - %s -fsanitize=function -fno-sanitize-recover=all | FileCheck %s
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// CHECK: @[[PROXY:.*]] = private unnamed_addr constant i8* bitcast ({ i8*, i8* }* @_ZTIFvvE to i8*)
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// CHECK: define{{.*}} void @_Z3funv() #0 !func_sanitize ![[FUNCSAN:.*]] {
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void fun() {}
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// CHECK-LABEL: define{{.*}} void @_Z6callerPFvvE(void ()* noundef %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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// CHECK: ![[FUNCSAN]] = !{i32 846595819, i8** @[[PROXY]]}
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