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; RUN: llc < %s | FileCheck %s
target triple = "x86_64-apple-macosx10.4.0"
; __stack_chk_guard must be loaded for twice, once for setting up the canary,
; another time for performing the check. It is because if we reuse the same
; stack guard value, it may get spilled to the stack, then the for loop may
; corrupt it.
;
; bool Bar(int*);
; bool Foo(int n) {
; int a[10];
; for (int i = 0; i < n; i++) {
; a[i] = 0;
; }
; return Bar(a);
; }
;
; CHECK: movq ___stack_chk_guard
; CHECK: movq ___stack_chk_guard
define zeroext i1 @_Z3Fooi(i32 %n) sspstrong {
entry:
%n.addr = alloca i32, align 4
%a = alloca [10 x i32], align 16
%i = alloca i32, align 4
store i32 %n, ptr %n.addr, align 4
store i32 0, ptr %i, align 4
br label %for.cond
for.cond: ; preds = %for.inc, %entry
%tmp = load i32, ptr %i, align 4
%tmp1 = load i32, ptr %n.addr, align 4
%cmp = icmp slt i32 %tmp, %tmp1
br i1 %cmp, label %for.body, label %for.end
for.body: ; preds = %for.cond
%tmp2 = load i32, ptr %i, align 4
%idxprom = sext i32 %tmp2 to i64
%arrayidx = getelementptr inbounds [10 x i32], ptr %a, i64 0, i64 %idxprom
store i32 0, ptr %arrayidx, align 4
br label %for.inc
for.inc: ; preds = %for.body
%tmp3 = load i32, ptr %i, align 4
%inc = add nsw i32 %tmp3, 1
store i32 %inc, ptr %i, align 4
br label %for.cond
for.end: ; preds = %for.cond
%call = call zeroext i1 @_Z3BarPi(ptr %a)
ret i1 %call
}
declare zeroext i1 @_Z3BarPi(ptr)
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