Fix mismatched adjust down/up of SP in functions that contain variable
sized allocas.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15806 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPC32ISelSimple.cpp b/lib/Target/PowerPC/PPC32ISelSimple.cpp
index 4e474e4..b1251d5 100644
--- a/lib/Target/PowerPC/PPC32ISelSimple.cpp
+++ b/lib/Target/PowerPC/PPC32ISelSimple.cpp
@@ -1439,9 +1439,9 @@
default: assert(0 && "Unknown class!");
}
- // Just to be safe, we'll always reserve the full 32 bytes worth of
- // argument passing space in case any called code gets funky on us.
- if (NumBytes < 24 + 32) NumBytes = 24 + 32;
+ // Just to be safe, we'll always reserve the full 24 bytes of linkage area
+ // plus 32 bytes of argument space in case any called code gets funky on us.
+ if (NumBytes < 56) NumBytes = 56;
// Adjust the stack pointer for the new arguments...
// These functions are automatically eliminated by the prolog/epilog pass
@@ -1586,7 +1586,7 @@
GPR_idx++;
}
} else {
- BuildMI(BB, PPC::ADJCALLSTACKDOWN, 1).addImm(0);
+ BuildMI(BB, PPC::ADJCALLSTACKDOWN, 1).addImm(NumBytes);
}
BuildMI(BB, PPC::IMPLICIT_DEF, 0, PPC::LR);