ValueTracking: Update a use of cannotBeOrderedLessThanZero

Makes assumes work.

Author: arsenm

llvm/lib/Analysis/InstructionSimplify.cpp

@@ -4138,7 +4138,8 @@ static Value *simplifyFCmpInst(unsigned Predicate, Value *LHS, Value *RHS,
       case FCmpInst::FCMP_UGT:
       case FCmpInst::FCMP_UNE:
         // (X >= 0) implies (X > C) when (C < 0)
-        if (CannotBeOrderedLessThanZero(LHS, Q.DL, Q.TLI))
+        if (cannotBeOrderedLessThanZero(LHS, Q.DL, Q.TLI, 0,
+                                        Q.AC, Q.CxtI, Q.DT))
           return getTrue(RetTy);
         break;
       case FCmpInst::FCMP_OEQ:

llvm/test/Transforms/InstSimplify/floating-point-compare.ll

@@ -1207,8 +1207,7 @@ define i1 @assumed_positive_ugt_with_negative_constant(float %a) {
 ; CHECK-LABEL: @assumed_positive_ugt_with_negative_constant(
 ; CHECK-NEXT:    [[ASSUME_CMP:%.*]] = fcmp ogt float [[A:%.*]], 0.000000e+00
 ; CHECK-NEXT:    call void @llvm.assume(i1 [[ASSUME_CMP]])
-; CHECK-NEXT:    [[CMP:%.*]] = fcmp ugt float [[A]], -3.000000e+00
-; CHECK-NEXT:    ret i1 [[CMP]]
+; CHECK-NEXT:    ret i1 true
 ;
   %assume.cmp = fcmp ogt float %a, 0.0
   call void @llvm.assume(i1 %assume.cmp)
@@ -1220,8 +1219,7 @@ define i1 @assumed_positive_uge_with_negative_constant(float %a) {
 ; CHECK-LABEL: @assumed_positive_uge_with_negative_constant(
 ; CHECK-NEXT:    [[ASSUME_CMP:%.*]] = fcmp ogt float [[A:%.*]], 0.000000e+00
 ; CHECK-NEXT:    call void @llvm.assume(i1 [[ASSUME_CMP]])
-; CHECK-NEXT:    [[CMP:%.*]] = fcmp uge float [[A]], -3.000000e+00
-; CHECK-NEXT:    ret i1 [[CMP]]
+; CHECK-NEXT:    ret i1 true
 ;
   %assume.cmp = fcmp ogt float %a, 0.0
   call void @llvm.assume(i1 %assume.cmp)
@@ -1233,8 +1231,7 @@ define i1 @assumed_positive_une_with_negative_constant(float %a) {
 ; CHECK-LABEL: @assumed_positive_une_with_negative_constant(
 ; CHECK-NEXT:    [[ASSUME_CMP:%.*]] = fcmp ogt float [[A:%.*]], 0.000000e+00
 ; CHECK-NEXT:    call void @llvm.assume(i1 [[ASSUME_CMP]])
-; CHECK-NEXT:    [[CMP:%.*]] = fcmp une float [[A]], -3.000000e+00
-; CHECK-NEXT:    ret i1 [[CMP]]
+; CHECK-NEXT:    ret i1 true
 ;
   %assume.cmp = fcmp ogt float %a, 0.0
   call void @llvm.assume(i1 %assume.cmp)