29 lines
1.1 KiB
LLVM
29 lines
1.1 KiB
LLVM
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; RUN: opt -safe-stack -S -mtriple=i386-pc-linux-gnu < %s -o - | FileCheck %s
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; RUN: opt -safe-stack -S -mtriple=x86_64-pc-linux-gnu < %s -o - | FileCheck %s
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%struct.deep = type { %union.anon }
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%union.anon = type { %struct.anon }
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%struct.anon = type { %struct.anon.0 }
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%struct.anon.0 = type { %union.anon.1 }
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%union.anon.1 = type { [2 x i8] }
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@.str = private unnamed_addr constant [4 x i8] c"%s\0A\00", align 1
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; [2 x i8] nested in several layers of structs and unions
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; safestack attribute
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; Requires no protector.
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; CHECK-LABEL: @foo(
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define signext i8 @foo() nounwind uwtable safestack {
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entry:
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; CHECK-NOT: __safestack_unsafe_stack_ptr
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%x = alloca %struct.deep, align 1
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%b = getelementptr inbounds %struct.deep, %struct.deep* %x, i32 0, i32 0
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%c = bitcast %union.anon* %b to %struct.anon*
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%d = getelementptr inbounds %struct.anon, %struct.anon* %c, i32 0, i32 0
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%e = getelementptr inbounds %struct.anon.0, %struct.anon.0* %d, i32 0, i32 0
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%array = bitcast %union.anon.1* %e to [2 x i8]*
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%arrayidx = getelementptr inbounds [2 x i8], [2 x i8]* %array, i32 0, i64 0
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%0 = load i8, i8* %arrayidx, align 1
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ret i8 %0
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}
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