It's debatable whether this transform is useful at all, but for now make sure
we don't generate invalid asm.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219084
91177308-0d34-0410-b5e6-
96231b3b80d8
unsigned B = MI->getOperand(1).getReg();
unsigned C = MI->getOperand(2).getReg();
if (B != C) return nullptr;
- unsigned M = MI->getOperand(3).getImm();
+ int64_t M = MI->getOperand(3).getImm();
NewMI = BuildMI(MF, MI->getDebugLoc(), get(X86::PSHUFDri))
.addOperand(Dest).addOperand(Src).addImm(M);
break;
--- /dev/null
+; RUN: llc < %s -mtriple=x86_64-apple-darwin13 -mcpu=pentium4 | FileCheck %s
+
+define <4 x float> @test1(<4 x i32>, <4 x float> %b) {
+ %s = shufflevector <4 x float> %b, <4 x float> undef, <4 x i32> <i32 1, i32 1, i32 2, i32 3>
+ ret <4 x float> %s
+
+; We convert shufps -> pshufd here to save a move.
+; CHECK-LABEL: test1:
+; CHECK: pshufd $-27, %xmm1, %xmm0
+; CHECK-NEXT: ret
+}