mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-23 19:23:23 +01:00
c5dc9d3b15
This reverts commit a05441038a3a4a011b9421751367c5c797d57137, reapplying commit 31574d38ac5fa4646cf01dd252a23e682402134f
42 lines
1.8 KiB
LLVM
42 lines
1.8 KiB
LLVM
; RUN: opt -early-cse -S < %s | FileCheck %s
|
|
|
|
target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
|
|
target triple = "aarch64"
|
|
|
|
; This test checks that SimplifyInstruction does not blow up in the face of
|
|
; a scalable shufflevector. vscale is a constant value known only at runtime.
|
|
; Therefore, it is not possible to know the concrete value of, or the length
|
|
; of the mask at compile time. Simplifications that depend on the value
|
|
; of the mask cannot be performed.
|
|
|
|
; Given the fact that the value of the mask is unknown at compile time for
|
|
; scalable vectors, very few simplifications will be done. Here, we want to
|
|
; see that the instruction can be passed to SimplifyInstruction and not crash
|
|
; the compiler. It happens to be the case that this will be the result.
|
|
|
|
; CHECK-LABEL: define <vscale x 8 x i1> @vscale_version()
|
|
; CHECK-NEXT: %splatter = insertelement <vscale x 8 x i1> undef, i1 true, i32 0
|
|
; CHECK-NEXT: %foo = shufflevector <vscale x 8 x i1> %splatter, <vscale x 8 x i1> undef, <vscale x 8 x i32> zeroinitializer
|
|
; CHECK-NEXT: ret <vscale x 8 x i1> %foo
|
|
|
|
define <vscale x 8 x i1> @vscale_version() {
|
|
%splatter = insertelement <vscale x 8 x i1> undef, i1 true, i32 0
|
|
%foo = shufflevector <vscale x 8 x i1> %splatter,
|
|
<vscale x 8 x i1> undef,
|
|
<vscale x 8 x i32> zeroinitializer
|
|
ret <vscale x 8 x i1> %foo
|
|
}
|
|
|
|
; The non-scalable version should be optimized as normal.
|
|
|
|
; CHECK-LABEL: define <8 x i1> @fixed_length_version() {
|
|
; CHECK-NEXT: ret <8 x i1> <i1 true, i1 true, i1 true, i1 true, i1 true, i1 true, i1 true, i1 true>
|
|
define <8 x i1> @fixed_length_version() {
|
|
%splatter = insertelement <8 x i1> undef, i1 true, i32 0
|
|
%foo = shufflevector <8 x i1> %splatter,
|
|
<8 x i1> undef,
|
|
<8 x i32> zeroinitializer
|
|
ret <8 x i1> %foo
|
|
}
|
|
|