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[AIX] Change the default target CPU to power4 for AIX on Power 

Summary: This patch changes the AIX default target CPU to power4 since this is the the lowest arch for the lowest OS level supported.

Reviewers: hubert.reinterpretcast, cebowleratibm, daltenty

Reviewed By: hubert.reinterpretcast

Subscribers: cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D80835
This commit is contained in:
Steven Wan 2020-06-03 13:49:47 -04:00
parent a9fe69c359
commit ba4afe6f7a
2 changed files with 28 additions and 8 deletions
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20
clang/lib/Driver/ToolChains/CommonArgs.cpp
View File

@ -294,14 +294,18 @@ std::string tools::getCPUName(const ArgList &Args, const llvm::Triple &T,
std::string TargetCPUName = ppc::getPPCTargetCPU(Args);
// LLVM may default to generating code for the native CPU,
// but, like gcc, we default to a more generic option for
// each architecture. (except on Darwin)
if (TargetCPUName.empty() && !T.isOSDarwin()) {
if (T.getArch() == llvm::Triple::ppc64)
TargetCPUName = "ppc64";
else if (T.getArch() == llvm::Triple::ppc64le)
TargetCPUName = "ppc64le";
else
TargetCPUName = "ppc";
// each architecture. (except on AIX or Darwin)
if (TargetCPUName.empty()) {
if (T.isOSAIX())
TargetCPUName = "pwr4";
else if (!T.isOSDarwin()) {
if (T.getArch() == llvm::Triple::ppc64)
TargetCPUName = "ppc64";
else if (T.getArch() == llvm::Triple::ppc64le)
TargetCPUName = "ppc64le";
else
TargetCPUName = "ppc";
}
}
return TargetCPUName;
}

16
clang/test/Driver/aix-mcpu-default.c Normal file
View File

@ -0,0 +1,16 @@
// Check that the target cpu defaults to power4 on AIX.
// RUN: %clang -no-canonical-prefixes %s -### -c 2>&1 \
// RUN: -target powerpc-ibm-aix \
// RUN: | FileCheck --check-prefix=CHECK-MCPU-DEFAULT %s
// CHECK-MCPU-DEFAULT-NOT: warning:
// CHECK-MCPU-DEFAULT: {{.*}}clang{{.*}}" "-cc1"
// CHECK-MCPU-DEFAULT: "-target-cpu" "pwr4"
// Check that the user is able to overwrite the default with '-mcpu'.
// RUN: %clang -no-canonical-prefixes %s -### -c 2>&1 \
// RUN: -mcpu=pwr6 \
// RUN: -target powerpc-ibm-aix \
// RUN: | FileCheck --check-prefix=CHECK-MCPU-USER %s
// CHECK-MCPU-USER-NOT: warning:
// CHECK-MCPU-USER: {{.*}}clang{{.*}}" "-cc1"
// CHECK-MCPU-USER: "-target-cpu" "pwr6"