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| author | Chris Lattner <sabre@nondot.org> | 2007-04-17 19:03:21 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2007-04-17 19:03:21 +0000 |
| commit | 95a5e0507e07fa3ef7c61aade9eb0efd1d716a25 (patch) | |
| tree | 5e0819e14bab28658a27d0ad6675ce695aaac06d /lib/Analysis/ScalarEvolutionExpander.cpp | |
| parent | 84e8315aaaf558195c73f0c04e9a1b1bc4dbd293 (diff) | |
SIGN_EXTEND_INREG does not demand its top bits. Give SimplifyDemandedBits
a chance to hack on it. This compiles:
int baz(long long a) { return (short)(((int)(a >>24)) >> 9); }
into:
_baz:
slwi r2, r3, 8
srwi r2, r2, 9
extsh r3, r2
blr
instead of:
_baz:
srwi r2, r4, 24
rlwimi r2, r3, 8, 0, 23
srwi r2, r2, 9
extsh r3, r2
blr
This implements CodeGen/PowerPC/sign_ext_inreg1.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36212 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Analysis/ScalarEvolutionExpander.cpp')
0 files changed, 0 insertions, 0 deletions