// Peek through to source op. If it is not infinity, this is not infinity.
return isKnownNeverInfinity(Inst->getOperand(0), TLI, Depth + 1);
}
+ case Instruction::FPTrunc: {
+ // Need a range check.
+ return false;
+ }
default:
break;
}
ret i1 %r
}
+define i1 @isKnownNeverInfinity_fptrunc(double %x) {
+; CHECK-LABEL: @isKnownNeverInfinity_fptrunc(
+; CHECK-NEXT: [[A:%.*]] = fadd ninf double [[X:%.*]], 1.000000e+00
+; CHECK-NEXT: [[E:%.*]] = fptrunc double [[A]] to float
+; CHECK-NEXT: [[R:%.*]] = fcmp une float [[E]], 0x7FF0000000000000
+; CHECK-NEXT: ret i1 [[R]]
+;
+ %a = fadd ninf double %x, 1.0
+ %e = fptrunc double %a to float
+ %r = fcmp une float %e, 0x7FF0000000000000
+ ret i1 %r
+}
+
+define i1 @isNotKnownNeverInfinity_fptrunc(double %unknown) {
+; CHECK-LABEL: @isNotKnownNeverInfinity_fptrunc(
+; CHECK-NEXT: [[E:%.*]] = fptrunc double [[UNKNOWN:%.*]] to float
+; CHECK-NEXT: [[R:%.*]] = fcmp une float [[E]], 0x7FF0000000000000
+; CHECK-NEXT: ret i1 [[R]]
+;
+ %e = fptrunc double %unknown to float
+ %r = fcmp une float %e, 0x7FF0000000000000
+ ret i1 %r
+}
+
define i1 @isKnownNeverInfinity_canonicalize(double %x) {
; CHECK-LABEL: @isKnownNeverInfinity_canonicalize(
; CHECK-NEXT: ret i1 true