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authorRafael Espindola <rafael.espindola@gmail.com>2010-07-11 04:01:49 +0000
committerRafael Espindola <rafael.espindola@gmail.com>2010-07-11 04:01:49 +0000
commitcbeeae23c31d32b833c9c7c3e8984e4cbcf22f45 (patch)
tree75fe2f72c8e4d9e68e7c9ec8c7655f4d94d710f3 /lib/Target
parent4f8e771ae89bcf934f931d64ef3ad9a188ce4921 (diff)
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Fix va_arg for doubles. With this patch VAARG nodes always contain the
correct alignment information, which simplifies ExpandRes_VAARG a bit. The patch introduces a new alignment information to TargetLoweringInfo. This is needed since the two natural candidates cannot be used: * The 's' in target data: If this is set to the minimal alignment of any argument, getCallFrameTypeAlignment would return 4 for doubles on ARM for example. * The getTransientStackAlignment method. It is possible for an architecture to have argument less aligned than what we maintain the stack pointer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108072 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target')
-rw-r--r--lib/Target/ARM/ARMISelLowering.cpp4
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index e1e5a80..e60a2b1 100644
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -539,6 +539,10 @@ ARMTargetLowering::ARMTargetLowering(TargetMachine &TM)
maxStoresPerMemcpy = 1; //// temporary - rewrite interface to use type
+ // On ARM arguments smaller than 4 bytes are extended, so all arguments
+ // are at least 4 bytes aligned.
+ setMinStackArgumentAlignment(4);
+
if (EnableARMCodePlacement)
benefitFromCodePlacementOpt = true;
}