[PowerPC] Disable float128 on AIX in Clang (#67298)

PowerPC AIX backend does not support float128 at all. Diagnose even when specifying -mfloat128 to avoid backend crash. --------- Co-authored-by: Kai Luo <gluokai@gmail.com>
llvm · Nov 20, 2023 · d572c4c · d572c4c
1 parent c1fe190
commit d572c4c
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diff --git a/clang/lib/Basic/Targets/PPC.cpp b/clang/lib/Basic/Targets/PPC.cpp
@@ -53,7 +53,7 @@ bool PPCTargetInfo::handleTargetFeatures(std::vector<std::string> &Features,
     } else if (Feature == "+htm") {
       HasHTM = true;
     } else if (Feature == "+float128") {
-      HasFloat128 = true;
+      HasFloat128 = !getTriple().isOSAIX();
     } else if (Feature == "+power9-vector") {
       HasP9Vector = true;
     } else if (Feature == "+power10-vector") {

diff --git a/clang/test/Sema/128bitfloat.cpp b/clang/test/Sema/128bitfloat.cpp
@@ -1,6 +1,7 @@
 // RUN: %clang_cc1 -verify -std=gnu++11 %s
 // RUN: %clang_cc1 -verify -std=c++11 %s
 // RUN: %clang_cc1 -triple powerpc64-linux -verify -std=c++11 %s
+// RUN: %clang_cc1 -triple powerpc64-ibm-aix -target-feature +float128 -verify -std=c++11 %s
 // RUN: %clang_cc1 -triple i686-windows-gnu -verify -std=c++11 %s
 // RUN: %clang_cc1 -triple x86_64-windows-gnu -verify -std=c++11 %s
 // RUN: %clang_cc1 -triple x86_64-windows-msvc -verify -std=c++11 %s