[PATCH] D87046: [PPC] Do not emit extswsli in 32BIT mode when using -mcpu=pwr9

[Zarko Todorovski via Phabricator via llvm-commits]

ZarkoCA updated this revision to Diff 295288.
ZarkoCA edited the summary of this revision.
ZarkoCA added a comment.

Code changes didn't get included in last diff.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D87046/new/

https://reviews.llvm.org/D87046

Files:
  llvm/lib/Target/PowerPC/PPCISelLowering.cpp
  llvm/test/CodeGen/PowerPC/ppc-32bit-shift.ll


Index: llvm/test/CodeGen/PowerPC/ppc-32bit-shift.ll
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/PowerPC/ppc-32bit-shift.ll
@@ -0,0 +1,28 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -verify-machineinstrs -mtriple=powerpc \
+; RUN:     -mcpu=pwr9 < %s | FileCheck %s --check-prefix=32BIT
+
+; RUN: llc -verify-machineinstrs -mtriple=powerpc64 \
+; RUN:     -mcpu=pwr9 < %s | FileCheck %s --check-prefix=64BIT
+
+define dso_local void @foo(i32 %inta, i64* %long_intb) {
+  entry:
+    %conv = sext i32 %inta to i64
+    %shl = shl nsw i64 %conv, 8
+    store i64 %shl, i64* %long_intb, align 8
+    ret void
+}
+
+; CHECK-LABEL:   foo:
+
+; 32BIT-DAG:     srawi [[REG1:[0-9]+]], [[REG2:[0-9]+]], 31
+; 32BIT-DAG:     rotlwi [[REG3:[0-9]+]], [[REG2]], 8
+; 32BIT-DAG:     slwi [[REG4:[0-9]+]], [[REG2]], 8
+; 32BIT-DAG:     rlwimi [[REG5:[0-9]+]], [[REG1]], 8, 0, 23
+; 32BIT-DAG:     stw [[REG4]], 4([[REG6:[0-9]+]])
+; 32BIT-DAG:     stw [[REG5]], 0([[REG6]])
+; 32BIT:         blr
+
+; 64BIT:         extswsli [[REG1:[0-9]+]], [[REG2:[0-9]+]], 8
+; 64BIT-NEXT:    std [[REG1]], 0([[REG3:[0-9]+]])
+; 64BIT-NEXT:    blr
Index: llvm/lib/Target/PowerPC/PPCISelLowering.cpp
===================================================================
--- llvm/lib/Target/PowerPC/PPCISelLowering.cpp
+++ llvm/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -16318,10 +16318,10 @@
 
   SDValue N0 = N->getOperand(0);
   ConstantSDNode *CN1 = dyn_cast<ConstantSDNode>(N->getOperand(1));
-  if (!Subtarget.isISA3_0() ||
+  if (!Subtarget.isISA3_0() || !Subtarget.isPPC64() ||
       N0.getOpcode() != ISD::SIGN_EXTEND ||
-      N0.getOperand(0).getValueType() != MVT::i32 ||
-      CN1 == nullptr || N->getValueType(0) != MVT::i64)
+      N0.getOperand(0).getValueType() != MVT::i32 || CN1 == nullptr ||
+      N->getValueType(0) != MVT::i64)
     return SDValue();
 
   // We can't save an operation here if the value is already extended, and


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