mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-09-04 09:30:13 +00:00
4932bbe20c
An obfuscated splat is where the frontend poorly generates code for a splat using several different shuffles to create the splat, i.e., %A = load <4 x float>* %in_ptr, align 16 %B = shufflevector <4 x float> %A, <4 x float> undef, <4 x i32> <i32 0, i32 0, i32 undef, i32 undef> %C = shufflevector <4 x float> %B, <4 x float> %A, <4 x i32> <i32 0, i32 1, i32 4, i32 undef> %D = shufflevector <4 x float> %C, <4 x float> %A, <4 x i32> <i32 0, i32 1, i32 2, i32 4> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166061 91177308-0d34-0410-b5e6-96231b3b80d8
12 lines
594 B
LLVM
12 lines
594 B
LLVM
; RUN: opt -instcombine -S %s | FileCheck %s
|
|
|
|
define void @test(<4 x float> *%in_ptr, <4 x float> *%out_ptr) {
|
|
%A = load <4 x float>* %in_ptr, align 16
|
|
%B = shufflevector <4 x float> %A, <4 x float> undef, <4 x i32> <i32 0, i32 0, i32 undef, i32 undef>
|
|
%C = shufflevector <4 x float> %B, <4 x float> %A, <4 x i32> <i32 0, i32 1, i32 4, i32 undef>
|
|
%D = shufflevector <4 x float> %C, <4 x float> %A, <4 x i32> <i32 0, i32 1, i32 2, i32 4>
|
|
; CHECK: %D = shufflevector <4 x float> %A, <4 x float> undef, <4 x i32> zeroinitializer
|
|
store <4 x float> %D, <4 x float> *%out_ptr
|
|
ret void
|
|
}
|