1 ; RUN: opt -safe-stack -S -mtriple=i386-pc-linux-gnu < %s -o - | FileCheck %s 2 ; RUN: opt -safe-stack -S -mtriple=x86_64-pc-linux-gnu < %s -o - | FileCheck %s 3 4 %struct.small = type { i8 } 5 6 @.str = private unnamed_addr constant [4 x i8] c"%s\0A\00", align 1 7 8 ; Address-of a structure taken in a function with a loop where 9 ; the alloca is an incoming value to a PHI node and a use of that PHI 10 ; node is also an incoming value. 11 ; Verify that the address-of analysis does not get stuck in infinite 12 ; recursion when chasing the alloca through the PHI nodes. 13 ; Requires protector. 14 define i32 @foo(i32 %arg) nounwind uwtable safestack { 15 bb: 16 ; CHECK: __safestack_unsafe_stack_ptr 17 %tmp = alloca %struct.small*, align 8 18 %tmp1 = call i32 (...) @dummy(%struct.small** %tmp) nounwind 19 %tmp2 = load %struct.small*, %struct.small** %tmp, align 8 20 %tmp3 = ptrtoint %struct.small* %tmp2 to i64 21 %tmp4 = trunc i64 %tmp3 to i32 22 %tmp5 = icmp sgt i32 %tmp4, 0 23 br i1 %tmp5, label %bb6, label %bb21 24 25 bb6: ; preds = %bb17, %bb 26 %tmp7 = phi %struct.small* [ %tmp19, %bb17 ], [ %tmp2, %bb ] 27 %tmp8 = phi i64 [ %tmp20, %bb17 ], [ 1, %bb ] 28 %tmp9 = phi i32 [ %tmp14, %bb17 ], [ %tmp1, %bb ] 29 %tmp10 = getelementptr inbounds %struct.small, %struct.small* %tmp7, i64 0, i32 0 30 %tmp11 = load i8, i8* %tmp10, align 1 31 %tmp12 = icmp eq i8 %tmp11, 1 32 %tmp13 = add nsw i32 %tmp9, 8 33 %tmp14 = select i1 %tmp12, i32 %tmp13, i32 %tmp9 34 %tmp15 = trunc i64 %tmp8 to i32 35 %tmp16 = icmp eq i32 %tmp15, %tmp4 36 br i1 %tmp16, label %bb21, label %bb17 37 38 bb17: ; preds = %bb6 39 %tmp18 = getelementptr inbounds %struct.small*, %struct.small** %tmp, i64 %tmp8 40 %tmp19 = load %struct.small*, %struct.small** %tmp18, align 8 41 %tmp20 = add i64 %tmp8, 1 42 br label %bb6 43 44 bb21: ; preds = %bb6, %bb 45 %tmp22 = phi i32 [ %tmp1, %bb ], [ %tmp14, %bb6 ] 46 %tmp23 = call i32 (...) @dummy(i32 %tmp22) nounwind 47 ret i32 undef 48 } 49 50 declare i32 @dummy(...) 51
