forked from OSchip/llvm-project
55 lines
1.7 KiB
LLVM
55 lines
1.7 KiB
LLVM
|
; 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, i32* %n.addr, align 4
|
||
|
|
store i32 0, i32* %i, align 4
|
||
|
|
br label %for.cond
|
||
|
|
|
||
|
|
for.cond: ; preds = %for.inc, %entry
|
||
|
|
%tmp = load i32, i32* %i, align 4
|
||
|
|
%tmp1 = load i32, i32* %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, i32* %i, align 4
|
||
|
|
%idxprom = sext i32 %tmp2 to i64
|
||
|
|
%arrayidx = getelementptr inbounds [10 x i32], [10 x i32]* %a, i64 0, i64 %idxprom
|
||
|
|
store i32 0, i32* %arrayidx, align 4
|
||
|
|
br label %for.inc
|
||
|
|
|
||
|
|
for.inc: ; preds = %for.body
|
||
|
|
%tmp3 = load i32, i32* %i, align 4
|
||
|
|
%inc = add nsw i32 %tmp3, 1
|
||
|
|
store i32 %inc, i32* %i, align 4
|
||
|
|
br label %for.cond
|
||
|
|
|
||
|
|
for.end: ; preds = %for.cond
|
||
|
|
%arraydecay = getelementptr inbounds [10 x i32], [10 x i32]* %a, i32 0, i32 0
|
||
|
|
%call = call zeroext i1 @_Z3BarPi(i32* %arraydecay)
|
||
|
|
ret i1 %call
|
||
|
|
}
|
||
|
|
|
||
|
|
declare zeroext i1 @_Z3BarPi(i32*)
|