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c485afdd8a
This code has been successfully used to bootstrap libc++ in a no-asserts mode for a very long time, so the code that follows cannot be completely incorrect. I've added a test that shows the current behavior for this kind of code with DFSan. If it is desirable for DFSan to do something special when processing an invoke of a variadic function, it can be added, but we shouldn't keep an assert that we've been ignoring due to release builds anyways. llvm-svn: 262829
62 lines
1.7 KiB
LLVM
62 lines
1.7 KiB
LLVM
; RUN: opt < %s -dfsan -S | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; CHECK-LABEL: @__dfsan_arg_tls
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; CHECK: = external thread_local(initialexec) global [64 x i16]
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; CHECK-LABEL: @__dfsan_retval_tls
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; CHECK: = external thread_local(initialexec) global i16
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declare i32 @f(i32)
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declare float @llvm.sqrt.f32(float)
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; CHECK-LABEL: @"dfs$call"
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define i32 @call() {
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; CHECK: store{{.*}}__dfsan_arg_tls
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; CHECK: call{{.*}}@"dfs$f"
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; CHECK: load{{.*}}__dfsan_retval_tls
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%r = call i32 @f(i32 0)
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; CHECK-NOT: store{{.*}}__dfsan_arg_tls
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%i = call float @llvm.sqrt.f32(float -1.0)
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; CHECK: store{{.*}}__dfsan_retval_tls
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; CHECK: ret i32
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ret i32 %r
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}
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declare i32 @__gxx_personality_v0(...)
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declare i8* @__cxa_begin_catch(i8*)
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declare void @__cxa_end_catch()
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declare void @g(...)
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; CHECK-LABEL: @"dfs$h"
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; CHECK: personality {{.*}} @"dfs$__gxx_personality_v0" {{.*}} {
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define i32 @h() personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
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entry:
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; CHECK: invoke void (...) @"dfs$g"(i32 42)
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invoke void (...) @g(i32 42)
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to label %try.cont unwind label %lpad
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lpad:
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%0 = landingpad { i8*, i32 }
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catch i8* null
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%1 = extractvalue { i8*, i32 } %0, 0
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; CHECK: store {{.*}} @__dfsan_arg_tls
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; CHECK: call {{.*}} @"dfs$__cxa_begin_catch"
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; CHECK: load {{.*}} @__dfsan_retval_tls
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%2 = tail call i8* @__cxa_begin_catch(i8* %1)
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; CHECK: call {{.*}} @"dfs$__cxa_end_catch"
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tail call void @__cxa_end_catch()
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br label %try.cont
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try.cont:
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ret i32 0
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}
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