PR11662.

Promotion of the mask operand needs to be done using PromoteTargetBoolean, and not padded with garbage.




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147309 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp

@@ -489,7 +489,11 @@ SDValue DAGTypeLegalizer::PromoteIntRes_SELECT(SDNode *N) {
 }
 
 SDValue DAGTypeLegalizer::PromoteIntRes_VSELECT(SDNode *N) {
-  SDValue Mask = GetPromotedInteger(N->getOperand(0));
+  SDValue Mask = N->getOperand(0);
+  EVT OpTy = N->getOperand(1).getValueType();
+
+  // Promote all the way up to the canonical SetCC type.
+  Mask = PromoteTargetBoolean(Mask, TLI.getSetCCResultType(OpTy));
   SDValue LHS = GetPromotedInteger(N->getOperand(1));
   SDValue RHS = GetPromotedInteger(N->getOperand(2));
   return DAG.getNode(ISD::VSELECT, N->getDebugLoc(),

test/CodeGen/X86/2011-12-28-vselecti8.ll

@@ -0,0 +1,20 @@
+; RUN: llc < %s -mtriple=x86_64-apple-darwin  -mcpu=corei7 | FileCheck %s
+; ModuleID = '<stdin>'
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-darwin11.2.0"
+
+; CHECK: @foo8
+; CHECK: psll
+; CHECK: psraw
+; CHECK: pblendvb
+; CHECK: ret
+define void @foo8(float* nocapture %RET) nounwind {
+allocas:
+  %resultvec.i = select <8 x i1> <i1 false, i1 true, i1 false, i1 true, i1 false, i1 true, i1 false, i1 true>, <8 x i8> <i8 1, i8 2, i8 3, i8 4, i8 5, i8 6, i8 7, i8 8>, <8 x i8> <i8 100, i8 100, i8 100, i8 100, i8 100, i8 100, i8 100, i8 100>
+  %uint2float = uitofp <8 x i8> %resultvec.i to <8 x float>
+  %ptr = bitcast float * %RET to <8 x float> *
+  store <8 x float> %uint2float, <8 x float>* %ptr, align 4
+  ret void
+}
+
+