32-to-64-bit sext_inreg pattern.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147004 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Mips/Mips64InstrInfo.td b/lib/Target/Mips/Mips64InstrInfo.td
index c58eade..681c7ae 100644
--- a/lib/Target/Mips/Mips64InstrInfo.td
+++ b/lib/Target/Mips/Mips64InstrInfo.td
@@ -215,6 +215,8 @@
def SLL64_32 : FR<0x0, 0x00, (outs CPU64Regs:$rd), (ins CPURegs:$rt),
"sll\t$rd, $rt, 0", [], IIAlu>;
+def SLL64_64 : FR<0x0, 0x00, (outs CPU64Regs:$rd), (ins CPU64Regs:$rt),
+ "sll\t$rd, $rt, 0", [], IIAlu>;
//===----------------------------------------------------------------------===//
// Arbitrary patterns that map to one or more instructions
@@ -311,3 +313,6 @@
def : Pat<(i64 (zext CPURegs:$src)), (DSRL (DSLL64_32 CPURegs:$src), 32)>;
def : Pat<(i64 (sext CPURegs:$src)), (SLL64_32 CPURegs:$src)>;
+// Sign extend in register
+def : Pat<(i64 (sext_inreg CPU64Regs:$src, i32)), (SLL64_64 CPU64Regs:$src)>;
+
diff --git a/test/CodeGen/Mips/mips64ext.ll b/test/CodeGen/Mips/mips64ext.ll
index ae6078b..7981ec7 100644
--- a/test/CodeGen/Mips/mips64ext.ll
+++ b/test/CodeGen/Mips/mips64ext.ll
@@ -9,3 +9,11 @@
%conv = zext i32 %add to i64
ret i64 %conv
}
+
+define i64 @sext64_32(i32 %a) nounwind readnone {
+entry:
+; CHECK: sll ${{[0-9]+}}, ${{[0-9]+}}, 0
+ %conv = sext i32 %a to i64
+ ret i64 %conv
+}
+