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riscv-gcc-1
Commit 89f1c7f2 by Richard Stallman
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(simplify_comparison): Rearrange conditional in SUBREG case. 

From-SVN: r1886
parent 60d00117
Showing with 6 additions and 4 deletions
gcc/combine.c
......@@ -7544,10 +7544,12 @@ simplify_comparison (code, pop0, pop1)
break;
case SUBREG:
/* If the inner mode is smaller and we are extracting the low
part, we can treat the SUBREG as if it were a ZERO_EXTEND. */
if (! subreg_lowpart_p (op0)
|| GET_MODE_BITSIZE (GET_MODE (SUBREG_REG (op0))) >= mode_width)
/* If the inner mode is narrower and we are extracting the low part,
we can treat the SUBREG as if it were a ZERO_EXTEND. */
if (subreg_lowpart_p (op0)
&& GET_MODE_BITSIZE (GET_MODE (SUBREG_REG (op0))) < mode_width)
/* Fall through */ ;
else
break;
/* ... fall through ... */
......
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