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

Review: Ulrich Weigand
https://reviews.llvm.org/D58240

llvm-svn: 354039
This commit is contained in:
Jonas Paulsson 2019-02-14 17:58:48 +00:00
parent a2a6acf3f0
commit aa0b77d339
2 changed files with 58 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)

50
llvm/test/CodeGen/SystemZ/fp-conv-18.mir Normal file
View File

@ -0,0 +1,50 @@
# RUN: llc -mtriple=s390x-linux-gnu -mcpu=z10 -start-before=codegenprepare %s \
# RUN: -o - | FileCheck %s
# Test that VEXTEND or VROUND nodes are not emitted without vector support.
--- |
@.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
...
# CHECK-LABEL: fun1:
# CHECK: ldeb
# CHECK-LABEL: fun2:
# CHECK: ledbr
---
name: fun1
alignment: 4
tracksRegLiveness: true
...
---
name: fun2
alignment: 4
tracksRegLiveness: true
...