[PATCH] D139761: Verifier: Enforce value of llvm.is.fpclass test mask
Matt Arsenault via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Fri Dec 9 18:20:39 PST 2022
arsenm created this revision.
arsenm added reviewers: jyknight, jcranmer-intel, sepavloff.
Herald added a subscriber: hiraditya.
Herald added a project: All.
arsenm requested review of this revision.
Herald added a subscriber: wdng.
Herald added a project: LLVM.
As requested in D137811 <https://reviews.llvm.org/D137811>
https://reviews.llvm.org/D139761
Files:
llvm/lib/IR/Verifier.cpp
llvm/test/Verifier/llvm.is.fpclass.ll
Index: llvm/test/Verifier/llvm.is.fpclass.ll
===================================================================
--- /dev/null
+++ llvm/test/Verifier/llvm.is.fpclass.ll
@@ -0,0 +1,23 @@
+; RUN: not llvm-as < %s 2>&1 | FileCheck %s
+
+; CHECK: immarg operand has non-immediate parameter
+; CHECK-NEXT: i32 %variable
+; CHECK-NEXT: %ret = call i1 @llvm.is.fpclass.f64(double %val, i32 %variable)
+define i1 @test_mask_variable(double %val, i32 %variable) {
+ %ret = call i1 @llvm.is.fpclass.f64(double %val, i32 %variable)
+ ret i1 %ret
+}
+
+; CHECK: llvm.is.fpclass test mask only has 10 bits
+define i1 @test_mask_neg1(double %val) {
+ %ret = call i1 @llvm.is.fpclass.f64(double %val, i32 -1)
+ ret i1 %ret
+}
+
+; CHECK: llvm.is.fpclass test mask only has 10 bits
+define i1 @test_mask_bit11(double %val) {
+ %ret = call i1 @llvm.is.fpclass.f64(double %val, i32 2048)
+ ret i1 %ret
+}
+
+declare i1 @llvm.is.fpclass.f64(double, i32 immarg)
Index: llvm/lib/IR/Verifier.cpp
===================================================================
--- llvm/lib/IR/Verifier.cpp
+++ llvm/lib/IR/Verifier.cpp
@@ -5010,6 +5010,12 @@
"an array");
break;
}
+ case Intrinsic::is_fpclass: {
+ const ConstantInt *TestMask = cast<ConstantInt>(Call.getOperand(1));
+ Check((TestMask->getZExtValue() & ~fcAllFlags) == 0,
+ "llvm.is.fpclass test mask only has 10 bits");
+ break;
+ }
case Intrinsic::fptrunc_round: {
// Check the rounding mode
Metadata *MD = nullptr;
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