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Recommit "[SystemZ] Do not emit VEXTEND or VROUND nodes without vector support." 

It seems there were some problem with using a .mir test. For some reason
doing '-stop-before=codegenprepare' and then '-start-before=codegenprepare'
on the output .mir file results in the NoVRegs Property after instruction
selection.

Recommitting the same test as an .ll file instead.

llvm-svn: 354160
This commit is contained in:
Jonas Paulsson 2019-02-15 19:13:55 +00:00
parent 5f5cac3ae2
commit c0eef3542b
2 changed files with 42 additions and 0 deletions
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8
llvm/lib/Target/SystemZ/SystemZISelLowering.cpp
View File

@ -5505,6 +5505,10 @@ SDValue SystemZTargetLowering::combineJOIN_DWORDS(
SDValue SystemZTargetLowering::combineFP_ROUND(
SDNode *N, DAGCombinerInfo &DCI) const {
if (!Subtarget.hasVector())
return SDValue();
// (fpround (extract_vector_elt X 0))
// (fpround (extract_vector_elt X 1)) ->
// (extract_vector_elt (VROUND X) 0)
@ -5552,6 +5556,10 @@ SDValue SystemZTargetLowering::combineFP_ROUND(
SDValue SystemZTargetLowering::combineFP_EXTEND(
SDNode *N, DAGCombinerInfo &DCI) const {
if (!Subtarget.hasVector())
return SDValue();
// (fpextend (extract_vector_elt X 0))
// (fpextend (extract_vector_elt X 2)) ->
// (extract_vector_elt (VEXTEND X) 0)

34
llvm/test/CodeGen/SystemZ/fp-conv-18.ll Normal file
View File

@ -0,0 +1,34 @@
; Test that VEXTEND or VROUND nodes are not emitted without vector support.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 | FileCheck %s
; CHECK-LABEL: fun1:
; CHECK: ldeb
; CHECK-LABEL: fun2:
; CHECK: ledbr
@.str = external dso_local unnamed_addr constant [21 x i8], align 2
define void @fun1() #0 {
bb:
%tmp = load <4 x float>, <4 x float>* undef, align 16
%tmp1 = extractelement <4 x float> %tmp, i32 0
%tmp2 = fpext float %tmp1 to double
%tmp3 = extractelement <4 x float> %tmp, i32 2
%tmp4 = fpext float %tmp3 to double
tail call void (i8*, ...) @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0), double %tmp2, double undef, double %tmp4, double undef)
ret void
}
define void @fun2() #0 {
bb:
%tmp = load <2 x double>, <2 x double>* undef, align 16
%tmp1 = extractelement <2 x double> %tmp, i32 0
%tmp2 = fptrunc double %tmp1 to float
%tmp3 = extractelement <2 x double> %tmp, i32 1
%tmp4 = fptrunc double %tmp3 to float
tail call void (i8*, ...) @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0), float %tmp2, float undef, float %tmp4, float undef)
ret void
}
declare dso_local void @printf(i8*, ...) #0