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PPC QPX requires a 32-byte aligned stack

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On systems which support the QPX vector instructions, the stack must be
32-byte aligned.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173993 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Hal Finkel
2013-01-30 23:43:27 +00:00
parent ac72eb264c
commit 9a79b320cb
3 changed files with 31 additions and 1 deletions
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6
lib/Target/PowerPC/PPCSubtarget.cpp
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@@ -83,6 +83,12 @@ PPCSubtarget::PPCSubtarget(const std::string &TT, const std::string &CPU,
// Set up darwin-specific properties.
if (isDarwin())
HasLazyResolverStubs = true;
// QPX requires a 32-byte aligned stack. Note that we need to do this if
// we're compiling for a BG/Q system regardless of whether or not QPX
// is enabled because external functions will assume this alignment.
if (hasQPX() || isBGQ())
StackAlignment = 32;
}
/// SetJITMode - This is called to inform the subtarget info that we are