1 ; fastisel should not fold add with non-pointer bitwidth
2 ; sext(a) + sext(b) != sext(a + b)
3 ; RUN: llc -mtriple=x86_64-apple-darwin %s -O0 -o - | FileCheck %s
5 define zeroext i8 @gep_promotion(ptr %ptr) nounwind uwtable ssp {
7 %ptr.addr = alloca ptr, align 8
8 %add = add i8 64, 64 ; 0x40 + 0x40
9 %0 = load ptr, ptr %ptr.addr, align 8
11 ; CHECK-LABEL: _gep_promotion:
12 ; CHECK: movzbl ({{.*}})
13 %arrayidx = getelementptr inbounds i8, ptr %0, i8 %add
15 %1 = load i8, ptr %arrayidx, align 1
19 define zeroext i8 @gep_promotion_nonconst(i8 %i, ptr %ptr) nounwind uwtable ssp {
21 %i.addr = alloca i8, align 4
22 %ptr.addr = alloca ptr, align 8
23 store i8 %i, ptr %i.addr, align 4
24 store ptr %ptr, ptr %ptr.addr, align 8
25 %0 = load i8, ptr %i.addr, align 4
26 ; CHECK-LABEL: _gep_promotion_nonconst:
27 ; CHECK: movzbl ({{.*}})
28 %xor = xor i8 %0, -128 ; %0 ^ 0x80
29 %add = add i8 %xor, -127 ; %xor + 0x81
30 %1 = load ptr, ptr %ptr.addr, align 8
32 %arrayidx = getelementptr inbounds i8, ptr %1, i8 %add
34 %2 = load i8, ptr %arrayidx, align 1