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      1 ; RUN: llc < %s -march=x86-64 -mattr=+sse42  | FileCheck %s
      2 ; CHECK: movdqa
      3 ; CHECK: pmulld
      4 ; CHECK: psubd
      5 
      6 ; widen a v3i32 to v4i32 to do a vector multiple and a subtraction
      7 
      8 define void @update(<3 x i32>* %dst, <3 x i32>* %src, i32 %n) nounwind {
      9 entry:
     10 	%dst.addr = alloca <3 x i32>*		; <<3 x i32>**> [#uses=2]
     11 	%src.addr = alloca <3 x i32>*		; <<3 x i32>**> [#uses=2]
     12 	%n.addr = alloca i32		; <i32*> [#uses=2]
     13 	%v = alloca <3 x i32>, align 16		; <<3 x i32>*> [#uses=1]
     14 	%i = alloca i32, align 4		; <i32*> [#uses=6]
     15 	store <3 x i32>* %dst, <3 x i32>** %dst.addr
     16 	store <3 x i32>* %src, <3 x i32>** %src.addr
     17 	store i32 %n, i32* %n.addr
     18 	store <3 x i32> < i32 1, i32 1, i32 1 >, <3 x i32>* %v
     19 	store i32 0, i32* %i
     20 	br label %forcond
     21 
     22 forcond:		; preds = %forinc, %entry
     23 	%tmp = load i32* %i		; <i32> [#uses=1]
     24 	%tmp1 = load i32* %n.addr		; <i32> [#uses=1]
     25 	%cmp = icmp slt i32 %tmp, %tmp1		; <i1> [#uses=1]
     26 	br i1 %cmp, label %forbody, label %afterfor
     27 
     28 forbody:		; preds = %forcond
     29 	%tmp2 = load i32* %i		; <i32> [#uses=1]
     30 	%tmp3 = load <3 x i32>** %dst.addr		; <<3 x i32>*> [#uses=1]
     31 	%arrayidx = getelementptr <3 x i32>* %tmp3, i32 %tmp2		; <<3 x i32>*> [#uses=1]
     32 	%tmp4 = load i32* %i		; <i32> [#uses=1]
     33 	%tmp5 = load <3 x i32>** %src.addr		; <<3 x i32>*> [#uses=1]
     34 	%arrayidx6 = getelementptr <3 x i32>* %tmp5, i32 %tmp4		; <<3 x i32>*> [#uses=1]
     35 	%tmp7 = load <3 x i32>* %arrayidx6		; <<3 x i32>> [#uses=1]
     36 	%mul = mul <3 x i32> %tmp7, < i32 4, i32 4, i32 4 >		; <<3 x i32>> [#uses=1]
     37 	%sub = sub <3 x i32> %mul, < i32 3, i32 3, i32 3 >		; <<3 x i32>> [#uses=1]
     38 	store <3 x i32> %sub, <3 x i32>* %arrayidx
     39 	br label %forinc
     40 
     41 forinc:		; preds = %forbody
     42 	%tmp8 = load i32* %i		; <i32> [#uses=1]
     43 	%inc = add i32 %tmp8, 1		; <i32> [#uses=1]
     44 	store i32 %inc, i32* %i
     45 	br label %forcond
     46 
     47 afterfor:		; preds = %forcond
     48 	ret void
     49 }
     50 
     51