[llvm] r278683 - [InstCombine] add tests for missing vector icmp folds

[Sanjay Patel via llvm-commits]

Author: spatel
Date: Mon Aug 15 12:10:35 2016
New Revision: 278683

URL: http://llvm.org/viewvc/llvm-project?rev=278683&view=rev
Log:
[InstCombine] add tests for missing vector icmp folds

Modified:
    llvm/trunk/test/Transforms/InstCombine/compare-signs.ll
    llvm/trunk/test/Transforms/InstCombine/icmp.ll

Modified: llvm/trunk/test/Transforms/InstCombine/compare-signs.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/InstCombine/compare-signs.ll?rev=278683&r1=278682&r2=278683&view=diff
==============================================================================
--- llvm/trunk/test/Transforms/InstCombine/compare-signs.ll (original)
+++ llvm/trunk/test/Transforms/InstCombine/compare-signs.ll Mon Aug 15 12:10:35 2016
@@ -67,6 +67,24 @@ define i1 @test4a(i32 %a) {
   ret i1 %c
 }
 
+; FIXME: Vectors should fold too.
+define <2 x i1> @test4a_vec(<2 x i32> %a) {
+; CHECK-LABEL: @test4a_vec(
+; CHECK-NEXT:    [[L:%.*]] = ashr <2 x i32> %a, <i32 31, i32 31>
+; CHECK-NEXT:    [[NA:%.*]] = sub <2 x i32> zeroinitializer, %a
+; CHECK-NEXT:    [[R:%.*]] = lshr <2 x i32> [[NA]], <i32 31, i32 31>
+; CHECK-NEXT:    [[SIGNUM:%.*]] = or <2 x i32> [[L]], [[R]]
+; CHECK-NEXT:    [[C:%.*]] = icmp slt <2 x i32> [[SIGNUM]], <i32 1, i32 1>
+; CHECK-NEXT:    ret <2 x i1> [[C]]
+;
+  %l = ashr <2 x i32> %a, <i32 31, i32 31>
+  %na = sub <2 x i32> zeroinitializer, %a
+  %r = lshr <2 x i32> %na, <i32 31, i32 31>
+  %signum = or <2 x i32> %l, %r
+  %c = icmp slt <2 x i32> %signum, <i32 1, i32 1>
+  ret <2 x i1> %c
+}
+
 define i1 @test4b(i64 %a) {
 ; CHECK-LABEL: @test4b(
 ; CHECK-NEXT:    [[C:%.*]] = icmp slt i64 %a, 1

Modified: llvm/trunk/test/Transforms/InstCombine/icmp.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/InstCombine/icmp.ll?rev=278683&r1=278682&r2=278683&view=diff
==============================================================================
--- llvm/trunk/test/Transforms/InstCombine/icmp.ll (original)
+++ llvm/trunk/test/Transforms/InstCombine/icmp.ll Mon Aug 15 12:10:35 2016
@@ -1185,6 +1185,18 @@ define i1 @icmp_mul_nsw_neg1(i32 %x) {
   ret i1 %cmp
 }
 
+; FIXME: Vectors should fold the same way.
+define <2 x i1> @icmp_mul_nsw_neg1_vec(<2 x i32> %x) {
+; CHECK-LABEL: @icmp_mul_nsw_neg1_vec(
+; CHECK-NEXT:    [[MUL:%.*]] = mul nsw <2 x i32> %x, <i32 -12, i32 -12>
+; CHECK-NEXT:    [[CMP:%.*]] = icmp sgt <2 x i32> [[MUL]], zeroinitializer
+; CHECK-NEXT:    ret <2 x i1> [[CMP]]
+;
+  %mul = mul nsw <2 x i32> %x, <i32 -12, i32 -12>
+  %cmp = icmp sge <2 x i32> %mul, <i32 1, i32 1>
+  ret <2 x i1> %cmp
+}
+
 define i1 @icmp_mul_nsw_0(i32 %x) {
 ; CHECK-LABEL: @icmp_mul_nsw_0(
 ; CHECK-NEXT:    ret i1 false