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https://github.com/c64scene-ar/llvm-6502.git
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c606c3ff91
Make sure we do not emit index computations with NSW flags so that we dont get an undef value if the GEP overflows git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160589 91177308-0d34-0410-b5e6-96231b3b80d8
129 lines
2.9 KiB
LLVM
129 lines
2.9 KiB
LLVM
; RUN: opt < %s -bounds-checking -S | FileCheck %s
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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"
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@.str = private constant [8 x i8] c"abcdefg\00" ; <[8 x i8]*>
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declare noalias i8* @malloc(i64) nounwind
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declare noalias i8* @calloc(i64, i64) nounwind
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declare noalias i8* @realloc(i8* nocapture, i64) nounwind
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; CHECK: @f1
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define void @f1() nounwind {
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%1 = tail call i8* @malloc(i64 32)
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%2 = bitcast i8* %1 to i32*
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%idx = getelementptr inbounds i32* %2, i64 2
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; CHECK-NOT: trap
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store i32 3, i32* %idx, align 4
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ret void
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}
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; CHECK: @f2
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define void @f2() nounwind {
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%1 = tail call i8* @malloc(i64 32)
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%2 = bitcast i8* %1 to i32*
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%idx = getelementptr inbounds i32* %2, i64 8
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; CHECK: trap
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store i32 3, i32* %idx, align 4
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ret void
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}
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; CHECK: @f3
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define void @f3(i64 %x) nounwind {
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%1 = tail call i8* @calloc(i64 4, i64 %x)
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%2 = bitcast i8* %1 to i32*
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%idx = getelementptr inbounds i32* %2, i64 8
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; CHECK: mul i64 4, %
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; CHECK: sub i64 {{.*}}, 32
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; CHECK-NEXT: icmp ult i64 {{.*}}, 32
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; CHECK-NEXT: icmp ult i64 {{.*}}, 4
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; CHECK-NEXT: or i1
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; CHECK: trap
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store i32 3, i32* %idx, align 4
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ret void
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}
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; CHECK: @f4
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define void @f4(i64 %x) nounwind {
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%1 = tail call i8* @realloc(i8* null, i64 %x) nounwind
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%2 = bitcast i8* %1 to i32*
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%idx = getelementptr inbounds i32* %2, i64 8
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; CHECK: trap
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%3 = load i32* %idx, align 4
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ret void
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}
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; CHECK: @f5
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define void @f5(i64 %x) nounwind {
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%idx = getelementptr inbounds [8 x i8]* @.str, i64 0, i64 %x
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; CHECK: trap
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%1 = load i8* %idx, align 4
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ret void
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}
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; CHECK: @f6
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define void @f6(i64 %x) nounwind {
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%1 = alloca i128
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; CHECK-NOT: trap
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%2 = load i128* %1, align 4
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ret void
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}
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; CHECK: @f7
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define void @f7(i64 %x) nounwind {
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%1 = alloca i128, i64 %x
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; CHECK: mul i64 16,
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; CHECK: trap
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%2 = load i128* %1, align 4
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ret void
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}
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; CHECK: @f8
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define void @f8() nounwind {
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%1 = alloca i128
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%2 = alloca i128
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%3 = select i1 undef, i128* %1, i128* %2
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; CHECK-NOT: trap
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%4 = load i128* %3, align 4
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ret void
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}
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; CHECK: @f9
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define void @f9(i128* %arg) nounwind {
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%1 = alloca i128
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%2 = select i1 undef, i128* %arg, i128* %1
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; CHECK-NOT: trap
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%3 = load i128* %2, align 4
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ret void
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}
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; CHECK: @f10
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define void @f10(i64 %x, i64 %y) nounwind {
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%1 = alloca i128, i64 %x
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%2 = alloca i128, i64 %y
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%3 = select i1 undef, i128* %1, i128* %2
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; CHECK: select
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; CHECK: select
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; CHECK: trap
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%4 = load i128* %3, align 4
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ret void
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}
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; CHECK: @f11
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define void @f11(i128* byval %x) nounwind {
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%1 = bitcast i128* %x to i8*
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%2 = getelementptr inbounds i8* %1, i64 16
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; CHECK: br label
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%3 = load i8* %2, align 4
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ret void
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}
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; CHECK: @f12
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define i64 @f12(i64 %x, i64 %y) nounwind {
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%1 = tail call i8* @calloc(i64 1, i64 %x)
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; CHECK: mul i64 %y, 8
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%2 = bitcast i8* %1 to i64*
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%3 = getelementptr inbounds i64* %2, i64 %y
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%4 = load i64* %3, align 8
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ret i64 %4
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}
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