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| author | QingShan Zhang <qshanz@cn.ibm.com> | 2018-09-07 07:56:05 +0000 |
|---|---|---|
| committer | QingShan Zhang <qshanz@cn.ibm.com> | 2018-09-07 07:56:05 +0000 |
| commit | abbb894ff58cff160f81954d794d009c3cb92eb9 (patch) | |
| tree | 54b3d22f3eaaabc253c5a786e0a828cec9c9011f /llvm/tools/llvm-objcopy/llvm-objcopy.cpp | |
| parent | 9e6845d8e12e4dba18e62a04a7980860eb3f46d2 (diff) | |
| download | llvm-abbb894ff58cff160f81954d794d009c3cb92eb9.zip llvm-abbb894ff58cff160f81954d794d009c3cb92eb9.tar.gz llvm-abbb894ff58cff160f81954d794d009c3cb92eb9.tar.bz2 | |
[PowerPC] Combine ADD to ADDZE
On the ppc64le platform, if ir has the following form,
define i64 @addze1(i64 %x, i64 %z) local_unnamed_addr #0 {
entry:
%cmp = icmp ne i64 %z, CONSTANT (-32767 <= CONSTANT <= 32768)
%conv1 = zext i1 %cmp to i64
%add = add nsw i64 %conv1, %x
ret i64 %add
}
we can optimize it to the form below.
when C == 0
--> addze X, (addic Z, -1))
/
add X, (zext(setne Z, C))--
\ when -32768 <= -C <= 32767 && C != 0
--> addze X, (addic (addi Z, -C), -1)
Patch By: HLJ2009 (Li Jia He)
Differential Revision: https://reviews.llvm.org/D51403
Reviewed By: Nemanjai
llvm-svn: 341634
Diffstat (limited to 'llvm/tools/llvm-objcopy/llvm-objcopy.cpp')
0 files changed, 0 insertions, 0 deletions