[clang] 6bf29db - [PowerPC] [Clang] Enable float128 feature on P9 by default

[Qiu Chaofan via cfe-commits]

Author: Qiu Chaofan
Date: 2020-12-07T18:31:00+08:00
New Revision: 6bf29dbb1541aff717e52b5c5fb12b84f5b38f21

URL: https://github.com/llvm/llvm-project/commit/6bf29dbb1541aff717e52b5c5fb12b84f5b38f21
DIFF: https://github.com/llvm/llvm-project/commit/6bf29dbb1541aff717e52b5c5fb12b84f5b38f21.diff

LOG: [PowerPC] [Clang] Enable float128 feature on P9 by default

As Power9 introduced hardware support for IEEE quad-precision FP type,
the feature should be enabled by default on Power9 or newer targets.

Reviewed By: steven.zhang

Differential Revision: https://reviews.llvm.org/D90213

Added: 
    

Modified: 
    clang/lib/Basic/Targets/PPC.cpp
    clang/test/Driver/ppc-f128-support-check.c

Removed: 
    


################################################################################
diff  --git a/clang/lib/Basic/Targets/PPC.cpp b/clang/lib/Basic/Targets/PPC.cpp
index 7f6f3d7e0c9f..a6997324acf9 100644
--- a/clang/lib/Basic/Targets/PPC.cpp
+++ b/clang/lib/Basic/Targets/PPC.cpp
@@ -317,6 +317,9 @@ bool PPCTargetInfo::initFeatureMap(
                         .Case("pwr9", true)
                         .Case("pwr8", true)
                         .Default(false);
+  Features["float128"] = llvm::StringSwitch<bool>(CPU)
+                        .Case("pwr9", true)
+                        .Default(false);
 
   Features["spe"] = llvm::StringSwitch<bool>(CPU)
                         .Case("8548", true)

diff  --git a/clang/test/Driver/ppc-f128-support-check.c b/clang/test/Driver/ppc-f128-support-check.c
index 24748905612f..2e4b7a7ae09c 100644
--- a/clang/test/Driver/ppc-f128-support-check.c
+++ b/clang/test/Driver/ppc-f128-support-check.c
@@ -1,7 +1,7 @@
 // RUN: not %clang -target powerpc64le-unknown-linux-gnu -fsyntax-only \
-// RUN:   -mcpu=pwr9 -mfloat128 %s 2>&1 | FileCheck %s --check-prefix=HASF128
+// RUN:   -mcpu=pwr9 %s 2>&1 | FileCheck %s --check-prefix=HASF128
 // RUN: not %clang -target powerpc64le-unknown-linux-gnu -fsyntax-only \
-// RUN:   -mcpu=power9 -mfloat128 %s 2>&1 | FileCheck %s --check-prefix=HASF128
+// RUN:   -mcpu=power9 %s 2>&1 | FileCheck %s --check-prefix=HASF128
 
 // RUN: not %clang -target powerpc64le-unknown-linux-gnu -fsyntax-only \
 // RUN:   -mcpu=pwr8 -mfloat128 %s 2>&1 | FileCheck %s --check-prefix=NOF128