llvm/test/Transforms/InstCombine/vec_sext.ll
Benjamin Kramer b45edea9b3 InstCombine: Modernize a bunch of cast combines.
Also make them vector-aware.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199608 91177308-0d34-0410-b5e6-96231b3b80d8
2014-01-19 20:05:13 +00:00

46 lines
1.6 KiB
LLVM

; RUN: opt < %s -instcombine -S | FileCheck %s
define <4 x i32> @psignd_3(<4 x i32> %a, <4 x i32> %b) nounwind ssp {
entry:
%cmp = icmp slt <4 x i32> %b, zeroinitializer
%sext = sext <4 x i1> %cmp to <4 x i32>
%sub = sub nsw <4 x i32> zeroinitializer, %a
%0 = icmp slt <4 x i32> %sext, zeroinitializer
%sext3 = sext <4 x i1> %0 to <4 x i32>
%1 = xor <4 x i32> %sext3, <i32 -1, i32 -1, i32 -1, i32 -1>
%2 = and <4 x i32> %a, %1
%3 = and <4 x i32> %sext3, %sub
%cond = or <4 x i32> %2, %3
ret <4 x i32> %cond
; CHECK-LABEL: @psignd_3
; CHECK: ashr <4 x i32> %b, <i32 31, i32 31, i32 31, i32 31>
; CHECK: sub nsw <4 x i32> zeroinitializer, %a
; CHECK: xor <4 x i32> %b.lobit, <i32 -1, i32 -1, i32 -1, i32 -1>
; CHECK: and <4 x i32> %a, %0
; CHECK: and <4 x i32> %b.lobit, %sub
; CHECK: or <4 x i32> %1, %2
}
define <4 x i32> @test1(<4 x i32> %a, <4 x i32> %b) nounwind ssp {
entry:
%cmp = icmp sgt <4 x i32> %b, <i32 -1, i32 -1, i32 -1, i32 -1>
%sext = sext <4 x i1> %cmp to <4 x i32>
%sub = sub nsw <4 x i32> zeroinitializer, %a
%0 = icmp slt <4 x i32> %sext, zeroinitializer
%sext3 = sext <4 x i1> %0 to <4 x i32>
%1 = xor <4 x i32> %sext3, <i32 -1, i32 -1, i32 -1, i32 -1>
%2 = and <4 x i32> %a, %1
%3 = and <4 x i32> %sext3, %sub
%cond = or <4 x i32> %2, %3
ret <4 x i32> %cond
; CHECK-LABEL: @test1
; CHECK: ashr <4 x i32> %b, <i32 31, i32 31, i32 31, i32 31>
; CHECK: xor <4 x i32> %b.lobit, <i32 -1, i32 -1, i32 -1, i32 -1>
; CHECK: sub nsw <4 x i32> zeroinitializer, %a
; CHECK: and <4 x i32> %b.lobit, %a
; CHECK: and <4 x i32> %b.lobit.not, %sub
; CHECK: or <4 x i32> %0, %1
}