Hi Eli,
Tried to commit the second patch, but some buildbots did like it. It
only works if we add one more branch to getRealTypeByWidth:
diff --git a/lib/Basic/TargetInfo.cpp b/lib/Basic/TargetInfo.cpp
index 38cb411..bf6acd2 100644
--- a/lib/Basic/TargetInfo.cpp
+++ b/lib/Basic/TargetInfo.cpp
@@ -174,7 +174,10 @@ TargetInfo::RealType
TargetInfo::getRealTypeByWidth(unsigned BitWidth) const {
switch (BitWidth) {
case 96:
- if (&getLongDoubleFormat() == &llvm::APFloat::x87DoubleExtended)
+ if (&getLongDoubleFormat() == &llvm::APFloat::x87DoubleExtended ||
+ // Due to test/Sema/attr-mode.c test it seems that
+ // PPC machines should use PPCDoubleDouble type for XC mode.
+ &getLongDoubleFormat() == &llvm::APFloat::PPCDoubleDouble)
return LongDouble;
break;
case 128:
If its OK, I would like to commit patch and this change.
-Stepan.
Eli Friedman wrote:
LGTM.
-Eli
On Mon, Sep 9, 2013 at 5:04 AM, Stepan Dyatkovskiy <[email protected]
<mailto:[email protected]>> wrote:
Since I had split the patch and committed only ASTContext and
TargetInfo getIntTypeByWidth and friends, there is the second patch,
that fixes PR16752 itself.
Please, find it in attachment for review.
-Stepan.
Eli Friedman wrote:
On Tue, Sep 3, 2013 at 2:16 AM, Stepan Dyatkovskiy
<[email protected] <mailto:[email protected]>
<mailto:[email protected] <mailto:[email protected]>>> wrote:
Hi Eli,
Sorry for latency.
As you remember this patch should correct 'mode' attr
implementation. You proposed to use generic way of type
detection
for each target: just scan for target types and select one with
suitable width.
Unfortunately I can't commit patch with generic
implementation. I
got test failure for clang. And I expect more failures for
another
targets. The reason is next.
The target could still keep mode unsupported even if it has
type of
suitable width. I mean the next.
For example this string should cause error for i686
machines (128
bit float):
typedef float f128ibm __attribute__ ((mode (TF)));
But in case of generic approach for all targets it would be
passed.
In this case virtual functions allows to implement exceptions.
The generic implementation is still essentially correct; the the
issue
is that getLongDoubleWidth() isn't actually the right value to
check.
It returns "sizeof(long double) * 8", not the actual width of the
underlying float format. You should be able to work around this by
checking getLongDoubleFormat() instead of getLongDoubleWidth().
In this case 'getIntTypeByWidth' may be a bit confusing name.
Instead it is supposed to return type for some particular
mode, not
by width. Something like getInt/RealTypeForMode(width, sign).
Though, currently I kept the original name.
If you want to change it, that's fine.
-Eli
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