[Verifier] Verify attribute denormal-fp-math[-f32]

llvm/lib/IR/Verifier.cpp

@@ -2401,6 +2401,25 @@ void Verifier::verifyFunctionAttrs(FunctionType *FT, AttributeList Attrs,
     if (!Info)
       CheckFailed("invalid name for a VFABI variant: " + S, V);
   }
+
+  auto IsValidDenormalMode = [](StringRef S) {
+    DenormalMode Denormals = parseDenormalFPAttribute(S);
+    return Denormals.Input != DenormalMode::Invalid &&
+           Denormals.Output != DenormalMode::Invalid;
+  };
+
+  if (auto A = Attrs.getFnAttr("denormal-fp-math"); A.isValid()) {
+    StringRef S = A.getValueAsString();
+    if (!IsValidDenormalMode(S))
+      CheckFailed("invalid value for 'denormal-fp-math' attribute: " + S, V);
+  }
+
+  if (auto A = Attrs.getFnAttr("denormal-fp-math-f32"); A.isValid()) {
+    StringRef S = A.getValueAsString();
+    if (!IsValidDenormalMode(S))
+      CheckFailed("invalid value for 'denormal-fp-math-f32' attribute: " + S,
+                  V);
+  }
 }
 
 void Verifier::verifyFunctionMetadata(

llvm/test/CodeGen/AMDGPU/clamp-modifier.ll

@@ -1657,7 +1657,7 @@ declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #1
 
 attributes #0 = { nounwind "denormal-fp-math-f32"="preserve-sign,preserve-sign" }
 attributes #1 = { nounwind readnone }
-attributes #2 = { nounwind "denormal-fp-math-f32"="ieee.ieee" }
+attributes #2 = { nounwind "denormal-fp-math-f32"="ieee,ieee" }
 attributes #3 = { nounwind "denormal-fp-math-f32"="ieee,ieee" "denormal-fp-math"="preserve-sign,preserve-sign" }
 
 !llvm.dbg.cu = !{!0}

llvm/test/DebugInfo/COFF/fortran-contained-proc.ll

@@ -74,8 +74,8 @@ declare void @llvm.dbg.declare(metadata, metadata, metadata) #3
 ; Function Attrs: mustprogress nofree nosync nounwind readnone speculatable willreturn
 declare void @llvm.dbg.value(metadata, metadata, metadata) #3
 
-attributes #0 = { nounwind uwtable "denormal-fp-math"="preserve_sign,preserve_sign" "frame-pointer"="none" "intel-lang"="fortran" "min-legal-vector-width"="0" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" }
-attributes #1 = { mustprogress nofree norecurse nosync nounwind uwtable willreturn writeonly "denormal-fp-math"="preserve_sign,preserve_sign" "frame-pointer"="none" "intel-lang"="fortran" "min-legal-vector-width"="0" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" }
+attributes #0 = { nounwind uwtable "denormal-fp-math"="preserve-sign,preserve-sign" "frame-pointer"="none" "intel-lang"="fortran" "min-legal-vector-width"="0" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" }
+attributes #1 = { mustprogress nofree norecurse nosync nounwind uwtable willreturn writeonly "denormal-fp-math"="preserve-sign,preserve-sign" "frame-pointer"="none" "intel-lang"="fortran" "min-legal-vector-width"="0" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" }
 attributes #2 = { nofree "intel-lang"="fortran" }
 attributes #3 = { mustprogress nofree nosync nounwind readnone speculatable willreturn }
 attributes #4 = { nounwind }

llvm/test/Transforms/Attributor/nofpclass-minimum-maximum.ll

@@ -511,6 +511,6 @@ attributes #3 = { "denormal-fp-math"="dynamic,dynamic" }
 attributes #4 = { "denormal-fp-math"="ieee,preserve-sign" }
 attributes #5 = { "denormal-fp-math"="preserve-sign,ieee" }
 attributes #6 = { "denormal-fp-math"="ieee,positive-zero" }
-attributes #7 = { "denormal-fp-math"="positive-zero-sign,ieee" }
+attributes #7 = { "denormal-fp-math"="positive-zero,ieee" }
 ;; NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
 ; TUNIT: {{.*}}

llvm/test/Transforms/Attributor/nofpclass-minnum-maxnum.ll

@@ -511,6 +511,6 @@ attributes #3 = { "denormal-fp-math"="dynamic,dynamic" }
 attributes #4 = { "denormal-fp-math"="ieee,preserve-sign" }
 attributes #5 = { "denormal-fp-math"="preserve-sign,ieee" }
 attributes #6 = { "denormal-fp-math"="ieee,positive-zero" }
-attributes #7 = { "denormal-fp-math"="positive-zero-sign,ieee" }
+attributes #7 = { "denormal-fp-math"="positive-zero,ieee" }
 ;; NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
 ; TUNIT: {{.*}}

llvm/test/Transforms/InstCombine/fcmp-denormals-are-zero.ll

@@ -350,5 +350,5 @@ declare <2 x double> @llvm.fabs.v2f64(<2 x double>)
 
 attributes #0 = { "denormal-fp-math"="ieee,preserve-sign" }
 attributes #1 = { "denormal-fp-math"="ieee,positive-zero" }
-attributes #2 = { "denormal-fp-math"="ieee,iee" }
+attributes #2 = { "denormal-fp-math"="ieee,ieee" }
 attributes #3 = { "denormal-fp-math-f32"="ieee,preserve-sign" }

llvm/test/Verifier/denormal-fp-math.ll

@@ -0,0 +1,20 @@
+; RUN: not llvm-as %s -o /dev/null 2>&1 | FileCheck %s
+
+define float @test_denormal_fp_math_valid() "denormal-fp-math"="ieee,ieee" {
+  ret float 1.0
+}
+
+; CHECK: invalid value for 'denormal-fp-math' attribute: foo,ieee
+define float @test_denormal_fp_math_invalid1() "denormal-fp-math"="foo,ieee" {
+  ret float 1.0
+}
+
+; CHECK: invalid value for 'denormal-fp-math' attribute: ieee,ieee,ieee
+define float @test_denormal_fp_math_invalid2() "denormal-fp-math"="ieee,ieee,ieee" {
+  ret float 1.0
+}
+
+; CHECK: invalid value for 'denormal-fp-math-f32' attribute: foo,ieee
+define float @test_denormal_fp_math_f32_invalid() "denormal-fp-math-f32"="foo,ieee" {
+  ret float 1.0
+}