mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-29 10:32:47 +00:00
38 lines
1.0 KiB
LLVM
38 lines
1.0 KiB
LLVM
|
; fastisel should not fold add with non-pointer bitwidth
|
||
|
|
; sext(a) + sext(b) != sext(a + b)
|
||
|
|
; RUN: llc -mtriple=x86_64-apple-darwin %s -O0 -o - | FileCheck %s
|
||
|
|
|
||
|
|
define zeroext i8 @gep_promotion(i8* %ptr) nounwind uwtable ssp {
|
||
|
|
entry:
|
||
|
|
%ptr.addr = alloca i8*, align 8
|
||
|
|
%add = add i8 64, 64 ; 0x40 + 0x40
|
||
|
|
%0 = load i8** %ptr.addr, align 8
|
||
|
|
|
||
|
|
; CHECK-LABEL: _gep_promotion:
|
||
|
|
; CHECK: movzbl ({{.*}})
|
||
|
|
%arrayidx = getelementptr inbounds i8* %0, i8 %add
|
||
|
|
|
||
|
|
%1 = load i8* %arrayidx, align 1
|
||
|
|
ret i8 %1
|
||
|
|
}
|
||
|
|
|
||
|
|
define zeroext i8 @gep_promotion_nonconst(i8 %i, i8* %ptr) nounwind uwtable ssp {
|
||
|
|
entry:
|
||
|
|
%i.addr = alloca i8, align 4
|
||
|
|
%ptr.addr = alloca i8*, align 8
|
||
|
|
store i8 %i, i8* %i.addr, align 4
|
||
|
|
store i8* %ptr, i8** %ptr.addr, align 8
|
||
|
|
%0 = load i8* %i.addr, align 4
|
||
|
|
; CHECK-LABEL: _gep_promotion_nonconst:
|
||
|
|
; CHECK: movzbl ({{.*}})
|
||
|
|
%xor = xor i8 %0, -128 ; %0 ^ 0x80
|
||
|
|
%add = add i8 %xor, -127 ; %xor + 0x81
|
||
|
|
%1 = load i8** %ptr.addr, align 8
|
||
|
|
|
||
|
|
%arrayidx = getelementptr inbounds i8* %1, i8 %add
|
||
|
|
|
||
|
|
%2 = load i8* %arrayidx, align 1
|
||
|
|
ret i8 %2
|
||
|
|
}
|
||
|
|
|