llvm-6502/test/Transforms/BoundsChecking/phi.ll
Nuno Lopes acee9e7056 BoundsChecking: fix a bug when the handling of recursive PHIs failed and could leave dangling references in the cache
add regression tests for this problem.

Can already compile & run: PHP, PCRE, and ICU  (i.e., all the software I tried)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157822 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-01 17:43:31 +00:00

49 lines
1.4 KiB
LLVM

; RUN: opt < %s -bounds-checking -S | FileCheck %s
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
@global = private unnamed_addr constant [10 x i8] c"ola\00mundo\00", align 1
; CHECK: f1
; no checks are possible here
; CHECK-NOT: trap
define void @f1(i8* nocapture %c) {
entry:
%0 = load i8* %c, align 1
%tobool1 = icmp eq i8 %0, 0
br i1 %tobool1, label %while.end, label %while.body
while.body:
%c.addr.02 = phi i8* [ %incdec.ptr, %while.body ], [ %c, %entry ]
%incdec.ptr = getelementptr inbounds i8* %c.addr.02, i64 -1
store i8 100, i8* %c.addr.02, align 1
%1 = load i8* %incdec.ptr, align 1
%tobool = icmp eq i8 %1, 0
br i1 %tobool, label %while.end, label %while.body
while.end:
ret void
}
; CHECK: f2
define void @f2() {
while.body.i.preheader:
%addr = getelementptr inbounds [10 x i8]* @global, i64 0, i64 9
br label %while.body.i
while.body.i:
; CHECK: phi
; CHECK-NEXT: phi
; CHECK-NEXT: phi
; CHECK: trap
%c.addr.02.i = phi i8* [ %incdec.ptr.i, %while.body.i ], [ %addr, %while.body.i.preheader ]
%incdec.ptr.i = getelementptr inbounds i8* %c.addr.02.i, i64 -1
store i8 100, i8* %c.addr.02.i, align 1
%0 = load i8* %incdec.ptr.i, align 1
%tobool.i = icmp eq i8 %0, 0
br i1 %tobool.i, label %fn.exit, label %while.body.i
fn.exit:
ret void
}