[APFloat] Fix checked error assert failures

`APFLoat::convertFromString` returns `Expected` result, which must be
"checked" if the LLVM_ENABLE_ABI_BREAKING_CHECKS preprocessor flag is
set.
To mark an `Expected` result as "checked" we must consume the `Error`
within.
In many cases, we are only interested in knowing if an error occured,
without the need to examine the error info. This is achieved, easily,
with the `errorToBool()` API.

5 files changed, 11 insertions, 12 deletions

diff --git a/llvm/lib/MC/MCParser/AsmParser.cpp b/llvm/lib/MC/MCParser/AsmParser.cpp
index 0c4eb953aa4..dc8132b627a 100644
--- a/llvm/lib/MC/MCParser/AsmParser.cpp
+++ b/llvm/lib/MC/MCParser/AsmParser.cpp
@@ -3130,7 +3130,9 @@ bool AsmParser::parseRealValue(const fltSemantics &Semantics, APInt &Res) {
       Value = APFloat::getNaN(Semantics, false, ~0);
     else
       return TokError("invalid floating point literal");
-  } else if (!Value.convertFromString(IDVal, APFloat::rmNearestTiesToEven))
+  } else if (errorToBool(
+                 Value.convertFromString(IDVal, APFloat::rmNearestTiesToEven)
+                     .takeError()))
     return TokError("invalid floating point literal");
   if (IsNeg)
     Value.changeSign();
diff --git a/llvm/lib/Support/APFloat.cpp b/llvm/lib/Support/APFloat.cpp
index f8a217d3535..050c37baefb 100644
--- a/llvm/lib/Support/APFloat.cpp
+++ b/llvm/lib/Support/APFloat.cpp
@@ -4518,9 +4518,8 @@ hash_code hash_value(const APFloat &Arg) {
 APFloat::APFloat(const fltSemantics &Semantics, StringRef S)
     : APFloat(Semantics) {
   auto StatusOrErr = convertFromString(S, rmNearestTiesToEven);
-  if (!StatusOrErr) {
-    assert(false && "Invalid floating point representation");
-  }
+  assert(StatusOrErr && "Invalid floating point representation");
+  consumeError(StatusOrErr.takeError());
 }
 
 APFloat::opStatus APFloat::convert(const fltSemantics &ToSemantics,
diff --git a/llvm/lib/Support/StringRef.cpp b/llvm/lib/Support/StringRef.cpp
index b5db172cc1a..104482de4ad 100644
--- a/llvm/lib/Support/StringRef.cpp
+++ b/llvm/lib/Support/StringRef.cpp
@@ -588,13 +588,11 @@ bool StringRef::getAsInteger(unsigned Radix, APInt &Result) const {
 
 bool StringRef::getAsDouble(double &Result, bool AllowInexact) const {
   APFloat F(0.0);
-  auto ErrOrStatus = F.convertFromString(*this, APFloat::rmNearestTiesToEven);
-  if (!ErrOrStatus) {
-    assert(false && "Invalid floating point representation");
+  auto StatusOrErr = F.convertFromString(*this, APFloat::rmNearestTiesToEven);
+  if (errorToBool(StatusOrErr.takeError()))
     return true;
-  }
 
-  APFloat::opStatus Status = *ErrOrStatus;
+  APFloat::opStatus Status = *StatusOrErr;
   if (Status != APFloat::opOK) {
     if (!AllowInexact || !(Status & APFloat::opInexact))
       return true;
diff --git a/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp b/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
index bd48e5d846a..70c9db13f13 100644
--- a/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
+++ b/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
@@ -1223,7 +1223,7 @@ public:
       APFloat RealVal(APFloat::IEEEdouble());
       auto StatusOrErr =
           RealVal.convertFromString(Desc->Repr, APFloat::rmTowardZero);
-      if (!StatusOrErr || *StatusOrErr != APFloat::opOK)
+      if (errorToBool(StatusOrErr.takeError()) || *StatusOrErr != APFloat::opOK)
         llvm_unreachable("FP immediate is not exact");
 
       if (getFPImm().bitwiseIsEqual(RealVal))
@@ -2580,7 +2580,7 @@ AArch64AsmParser::tryParseFPImm(OperandVector &Operands) {
     APFloat RealVal(APFloat::IEEEdouble());
     auto StatusOrErr =
         RealVal.convertFromString(Tok.getString(), APFloat::rmTowardZero);
-    if (!StatusOrErr) {
+    if (errorToBool(StatusOrErr.takeError())) {
       TokError("invalid floating point representation");
       return MatchOperand_ParseFail;
     }
diff --git a/llvm/lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp b/llvm/lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp
index 326df6bc8fb..d5834826fcd 100644
--- a/llvm/lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp
+++ b/llvm/lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp
@@ -2363,7 +2363,7 @@ AMDGPUAsmParser::parseImm(OperandVector &Operands, bool HasSP3AbsModifier) {
 
     APFloat RealVal(APFloat::IEEEdouble());
     auto roundMode = APFloat::rmNearestTiesToEven;
-    if (!RealVal.convertFromString(Num, roundMode)) {
+    if (errorToBool(RealVal.convertFromString(Num, roundMode).takeError())) {
       return MatchOperand_ParseFail;
     }
     if (Negate)