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[demangler] PPC and S390: Fix parsing of e-prefixed long double literals

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Summary:
This patch is to fix the parsing of long double literals encoded with the e prefix on PowerPC and S390. For both PowerPC and S390, type code e is used for 64-bit long double literals and g is used for 128-bit long double literals. libcxxabi test case test_demangle.pass.cpp fails without the fix.

Authored by: xingxue-ibm

Reviewers: hubert.reinterpretcast, jasonliu, erik.pilkington, uweigand, mclow.li
sts, libc++abi

Reviewed by: hubert.reinterpretcast, erik.pilkington

Differential Revision: https://reviews.llvm.org/D74163
This commit is contained in:
Xing Xue
2020-04-15 09:59:06 -04:00
parent 1242018033
commit 4578fa8a1c
2 changed files with 12 additions and 0 deletions
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libcxxabi/src/demangle/ItaniumDemangle.h
+6
View File
@@ -4225,7 +4225,13 @@ Node *AbstractManglingParser<Derived, Alloc>::parseExprPrimary() {
return getDerived().template parseFloatingLiteral<double>();
case 'e':
++First;
#if defined(__powerpc__) || defined(__s390__)
// Handle cases where long doubles encoded with e have the same size
// and representation as doubles.
return getDerived().template parseFloatingLiteral<double>();
#else
return getDerived().template parseFloatingLiteral<long double>();
#endif
case '_':
if (consumeIf("_Z")) {
Node *R = getDerived().parseEncoding();
llvm/include/llvm/Demangle/ItaniumDemangle.h
+6
View File
@@ -4225,7 +4225,13 @@ Node *AbstractManglingParser<Derived, Alloc>::parseExprPrimary() {
return getDerived().template parseFloatingLiteral<double>();
case 'e':
++First;
#if defined(__powerpc__) || defined(__s390__)
// Handle cases where long doubles encoded with e have the same size
// and representation as doubles.
return getDerived().template parseFloatingLiteral<double>();
#else
return getDerived().template parseFloatingLiteral<long double>();
#endif
case '_':
if (consumeIf("_Z")) {
Node *R = getDerived().parseEncoding();