diff options
| author | Uros Bizjak <ubizjak@gmail.com> | 2019-06-19 16:38:58 +0200 |
|---|---|---|
| committer | Uros Bizjak <uros@gcc.gnu.org> | 2019-06-19 16:38:58 +0200 |
| commit | 7a907deeeb0b17ed332eb6e3a181a35b1873daf5 (patch) | |
| tree | 047fbeb44b327bfb0e2a2cd5565adbaca248b9e2 /gcc | |
| parent | 25403c416e5f12d681d1fc45a8789d19ab40297f (diff) | |
| download | gcc-7a907deeeb0b17ed332eb6e3a181a35b1873daf5.zip gcc-7a907deeeb0b17ed332eb6e3a181a35b1873daf5.tar.gz gcc-7a907deeeb0b17ed332eb6e3a181a35b1873daf5.tar.bz2 | |
i386.md (cmpstrnsi): Remove dead code.
* config/i386/i386.md (cmpstrnsi): Remove dead code.
From-SVN: r272474
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/config/i386/i386.md | 26 |
2 files changed, 13 insertions, 17 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index b39712f..aa92a3e 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,7 @@ +2019-06-19 Uroš Bizjak <ubizjak@gmail.com> + + * config/i386/i386.md (cmpstrnsi): Remove dead code. + 2019-06-19 Wilco Dijkstra <wdijkstr@arm.com> PR middle-end/84521 diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md index e9b6923..6c14a37 100644 --- a/gcc/config/i386/i386.md +++ b/gcc/config/i386/i386.md @@ -17004,7 +17004,7 @@ (use (match_operand 4 "immediate_operand"))] "" { - rtx addr1, addr2, out, outlow, count, countreg, align; + rtx addr1, addr2, countreg, align, out; if (optimize_insn_for_size_p () && !TARGET_INLINE_ALL_STRINGOPS) FAIL; @@ -17028,10 +17028,6 @@ && TREE_CODE (TREE_OPERAND (TREE_OPERAND (t2, 0), 0)) == STRING_CST))) FAIL; - out = operands[0]; - if (!REG_P (out)) - out = gen_reg_rtx (SImode); - addr1 = copy_addr_to_reg (XEXP (operands[1], 0)); addr2 = copy_addr_to_reg (XEXP (operands[2], 0)); if (addr1 != XEXP (operands[1], 0)) @@ -17039,17 +17035,16 @@ if (addr2 != XEXP (operands[2], 0)) operands[2] = replace_equiv_address_nv (operands[2], addr2); - count = operands[3]; - countreg = ix86_zero_extend_to_Pmode (count); + countreg = ix86_zero_extend_to_Pmode (operands[3]); /* %%% Iff we are testing strict equality, we can use known alignment to good advantage. This may be possible with combine, particularly once cc0 is dead. */ align = operands[4]; - if (CONST_INT_P (count)) + if (CONST_INT_P (operands[3])) { - if (INTVAL (count) == 0) + if (operands[3] == const0_rtx) { emit_move_insn (operands[0], const0_rtx); DONE; @@ -17064,12 +17059,9 @@ operands[1], operands[2])); } - outlow = gen_lowpart (QImode, out); - emit_insn (gen_cmpintqi (outlow)); - emit_move_insn (out, gen_rtx_SIGN_EXTEND (SImode, outlow)); - - if (operands[0] != out) - emit_move_insn (operands[0], out); + out = gen_lowpart (QImode, operands[0]); + emit_insn (gen_cmpintqi (out)); + emit_move_insn (operands[0], gen_rtx_SIGN_EXTEND (SImode, out)); DONE; }) @@ -19320,7 +19312,7 @@ (match_operand:SI 2 "const_int_operand"))] "TARGET_3DNOW || TARGET_PREFETCH_SSE || TARGET_PRFCHW || TARGET_PREFETCHWT1" { - bool write = INTVAL (operands[1]) != 0; + bool write = operands[1] != const0_rtx; int locality = INTVAL (operands[2]); gcc_assert (IN_RANGE (locality, 0, 3)); @@ -19385,7 +19377,7 @@ (const_int 3))] "TARGET_3DNOW || TARGET_PRFCHW || TARGET_PREFETCHWT1" { - if (INTVAL (operands[1]) == 0) + if (operands[1] == const0_rtx) return "prefetch\t%a0"; else return "prefetchw\t%a0"; |