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riscv-gcc-1
Commit c070dcf7 by Richard Stallman
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comment change. 

From-SVN: r4797
parent 72cdb410
Showing with 1 additions and 1 deletions
gcc/combine.c
...@@ -3997,7 +3997,7 @@ subst (x, from, to, in_dest, unique_copy) ...@@ -3997,7 +3997,7 @@ subst (x, from, to, in_dest, unique_copy)
means that we only care about the low bits of the result. means that we only care about the low bits of the result.
However, on most machines (those with neither BYTE_LOADS_ZERO_EXTEND However, on most machines (those with neither BYTE_LOADS_ZERO_EXTEND
nor BYTES_LOADS_SIGN_EXTEND defined), we cannot perform a nor BYTE_LOADS_SIGN_EXTEND defined), we cannot perform a
narrower operation that requested since the high-order bits will narrower operation that requested since the high-order bits will
be undefined. On machine where BYTE_LOADS_*_EXTEND is defined, be undefined. On machine where BYTE_LOADS_*_EXTEND is defined,
however, this transformation is safe as long as M1 and M2 have however, this transformation is safe as long as M1 and M2 have
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