94382c8e56
This is a reland for 99e53cb4139eda491f97cb33ee42ea424d352200 with the appropriate test fixes. It's possible for __stack_chk_fail to be an alias when using CrossDSOCFI since it will make a jump table entry for this function and replace it with an alias. StackProtector can crash since it always expects this to be a regular function. Instead add the noreturn attribute to the call.
35 lines
922 B
LLVM
35 lines
922 B
LLVM
;; This is a minimal reproducer that caused StackProtector to crash with a bad cast when
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;; CrossDSOCFI is used. This test just needs to not crash.
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; REQUIRES: x86-registered-target
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; RUN: opt -mtriple=x86_64-pc-linux-gnu %s -passes=lowertypetests,cross-dso-cfi,stack-protector
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define hidden void @__stack_chk_fail() !type !1{
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unreachable
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}
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define void @store_captures() sspstrong {
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entry:
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%a = alloca i32, align 4
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%j = alloca ptr, align 8
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store ptr %a, ptr %j, align 8
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ret void
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}
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define void @func(ptr %0) {
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entry:
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%1 = call i1 @llvm.type.test(ptr %0, metadata !"typeid")
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br i1 %1, label %cont, label %trap
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trap: ; preds = %entry
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call void @llvm.trap()
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unreachable
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cont: ; preds = %entry
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call void %0()
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ret void
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}
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!llvm.module.flags = !{!0}
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!0 = !{i32 4, !"Cross-DSO CFI", i32 1}
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!1 = !{i64 0, !"typeid"}
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