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Enable frame pointer elimination for OpenBSD on x86 and mips64. 

llvm-svn: 358245
This commit is contained in:
Brad Smith 2019-04-12 01:29:18 +00:00
parent 492cad51a4
commit 21375ca136
2 changed files with 21 additions and 0 deletions
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12
clang/lib/Driver/ToolChains/Clang.cpp
View File

@ -534,6 +534,18 @@ static bool useFramePointerForTargetByDefault(const ArgList &Args,
return !areOptimizationsEnabled(Args);
}
if (Triple.isOSOpenBSD()) {
switch (Triple.getArch()) {
case llvm::Triple::mips64:
case llvm::Triple::mips64el:
case llvm::Triple::x86:
case llvm::Triple::x86_64:
return !areOptimizationsEnabled(Args);
default:
return true;
}
}
if (Triple.isOSLinux() || Triple.getOS() == llvm::Triple::CloudABI ||
Triple.isOSHurd()) {
switch (Triple.getArch()) {

9
clang/test/Driver/frame-pointer-elim.c
View File

@ -26,6 +26,15 @@
// RUN: FileCheck --check-prefix=NETBSD %s
// NETBSD-NOT: "-momit-leaf-frame-pointer"
// OpenBSD follows the same rules as Linux.
// RUN: %clang -### -target x86_64-unknown-openbsd -S -O1 %s 2>&1 | \
// RUN: FileCheck --check-prefix=OPENBSD-OPT %s
// OPENBSD-OPT: "-momit-leaf-frame-pointer"
// RUN: %clang -### -target x86_64-unknown-openbsd -S %s 2>&1 | \
// RUN: FileCheck --check-prefix=OPENBSD %s
// OPENBSD-NOT: "-momit-leaf-frame-pointer"
// Darwin disables omitting the leaf frame pointer even under optimization
// unless the command lines are given.
// RUN: %clang -### -target i386-apple-darwin -S %s 2>&1 | \