Stack space for argument passing is 32 regardless of 32- vs. 64-bit arch.
Thanks to Nate Begeman for pointing this out.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15930 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPC64ISelSimple.cpp b/lib/Target/PowerPC/PPC64ISelSimple.cpp
index f80c569..b2dd07e 100644
--- a/lib/Target/PowerPC/PPC64ISelSimple.cpp
+++ b/lib/Target/PowerPC/PPC64ISelSimple.cpp
@@ -94,10 +94,10 @@
std::map<AllocaInst*, unsigned> AllocaMap;
// Target configuration data
- const unsigned ParameterSaveAreaOffset;
+ const unsigned ParameterSaveAreaOffset, MaxArgumentStackSpace;
ISel(TargetMachine &tm) : TM(reinterpret_cast<PPC64TargetMachine&>(tm)),
- F(0), BB(0), ParameterSaveAreaOffset(24) {}
+ F(0), BB(0), ParameterSaveAreaOffset(24), MaxArgumentStackSpace(32) {}
bool doInitialization(Module &M) {
// Add external functions that we may call
@@ -1290,10 +1290,10 @@
default: assert(0 && "Unknown class!");
}
- // Just to be safe, we'll always reserve the full 64 bytes worth of
- // argument passing space in case any called code gets funky on us.
- if (NumBytes < ParameterSaveAreaOffset + 64)
- NumBytes = ParameterSaveAreaOffset + 64;
+ // Just to be safe, we'll always reserve the full argument passing space in
+ // case any called code gets funky on us.
+ if (NumBytes < ParameterSaveAreaOffset + MaxArgumentStackSpace)
+ NumBytes = ParameterSaveAreaOffset + MaxArgumentStackSpace;
// Adjust the stack pointer for the new arguments...
// These functions are automatically eliminated by the prolog/epilog pass