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| author | Bill Wendling <isanbard@gmail.com> | 2010-06-09 19:00:55 +0000 |
|---|---|---|
| committer | Bill Wendling <isanbard@gmail.com> | 2010-06-09 19:00:55 +0000 |
| commit | 5ac1d23d3d2d7a79fe520978927e9c47f65e27eb (patch) | |
| tree | 477aa096689d0d417219302e02e86d748703d288 /clang/lib/Frontend/CompilerInvocation.cpp | |
| parent | ae83e1f5cbfb120c20965b8d3294888d8a97a785 (diff) | |
| download | llvm-5ac1d23d3d2d7a79fe520978927e9c47f65e27eb.zip llvm-5ac1d23d3d2d7a79fe520978927e9c47f65e27eb.tar.gz llvm-5ac1d23d3d2d7a79fe520978927e9c47f65e27eb.tar.bz2 | |
It's an error to translate this:
%reg1025 = <sext> %reg1024
...
%reg1026 = SUBREG_TO_REG 0, %reg1024, 4
into this:
%reg1025 = <sext> %reg1024
...
%reg1027 = EXTRACT_SUBREG %reg1025, 4
%reg1026 = SUBREG_TO_REG 0, %reg1027, 4
The problem here is that SUBREG_TO_REG is there to assert that an implicit zext
occurs. It doesn't insert a zext instruction. If we allow the EXTRACT_SUBREG
here, it will give us the value after the <sext>, not the original value of
%reg1024 before <sext>.
llvm-svn: 105741
Diffstat (limited to 'clang/lib/Frontend/CompilerInvocation.cpp')
0 files changed, 0 insertions, 0 deletions