1 ; RUN: llc %s -o - -verify-machineinstrs | FileCheck %s
3 target datalayout = "e-m:o-p:32:32-f64:32:64-v64:32:64-v128:32:128-a:0:32-n32-S32"
4 target triple = "thumbv7s-apple-ios8.0.0"
6 @debw = external global ptr, align 4
8 ; This test ensures that the stack_chk call correctly puts implicit uses/defs for the registers
9 ; live across it when if converting. This will be R0 which is passed to the call to free at the end
11 ; Prior to this change, the stack_chk call (which does not return) would clobber R0 in its regmask,
12 ; leading to verifier errors because the later use of R0 in free() is not live.
15 ; CHECK: stack_chk_fail
18 define void @test(i32 %argc, ptr nocapture readonly %argv, ptr %ptr, i32 %val) #0 {
20 %count.i = alloca [256 x i32], align 4
21 %cmp284.i = icmp eq i32 %val, 0
22 br i1 %cmp284.i, label %for.end31.i, label %for.body21.i
24 for.body21.i: ; preds = %entry
25 %arrayidx23.i = getelementptr inbounds [256 x i32], ptr %count.i, i32 0, i32 1
26 %tmp20 = load i32, ptr %arrayidx23.i, align 4, !tbaa !0
27 store i32 %tmp20, ptr %ptr, align 4, !tbaa !0
30 for.end31.i: ; preds = %for.body21.i, %entry
31 %tmp21 = load ptr, ptr @debw, align 4, !tbaa !4
32 tail call void @free(ptr %tmp21)
36 declare void @free(ptr nocapture)
38 attributes #0 = { ssp "stack-protector-buffer-size"="8" }
41 !1 = !{!"int", !2, i64 0}
42 !2 = !{!"omnipotent char", !3, i64 0}
43 !3 = !{!"Simple C/C++ TBAA"}
45 !5 = !{!"any pointer", !2, i64 0}