diff options
Diffstat (limited to 'toolchain-layer/recipes-devtools/gcc/gcc-4.5/linaro/gcc-4.5-linaro-r99421.patch')
| -rw-r--r-- | toolchain-layer/recipes-devtools/gcc/gcc-4.5/linaro/gcc-4.5-linaro-r99421.patch | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/toolchain-layer/recipes-devtools/gcc/gcc-4.5/linaro/gcc-4.5-linaro-r99421.patch b/toolchain-layer/recipes-devtools/gcc/gcc-4.5/linaro/gcc-4.5-linaro-r99421.patch new file mode 100644 index 0000000000..3a45ee5026 --- /dev/null +++ b/toolchain-layer/recipes-devtools/gcc/gcc-4.5/linaro/gcc-4.5-linaro-r99421.patch @@ -0,0 +1,94 @@ +2010-10-20 Nathan Froyd <froydnj@codesourcery.com> + + Issue #9781 + + Backport from mainline: + + gcc/ + 2010-10-20 Nathan Froyd <froydnj@codesourcery.com> + + * ifcvt.c (noce_emit_cmove): If both of the values are SUBREGs, try + emitting the conditional move in the inner mode of the SUBREG. + + +=== modified file 'gcc/ifcvt.c' +--- old/gcc/ifcvt.c 2010-10-15 10:01:07 +0000 ++++ new/gcc/ifcvt.c 2010-11-04 12:11:15 +0000 +@@ -1338,6 +1338,9 @@ + noce_emit_cmove (struct noce_if_info *if_info, rtx x, enum rtx_code code, + rtx cmp_a, rtx cmp_b, rtx vfalse, rtx vtrue) + { ++ rtx target; ++ int unsignedp; ++ + /* If earliest == jump, try to build the cmove insn directly. + This is helpful when combine has created some complex condition + (like for alpha's cmovlbs) that we can't hope to regenerate +@@ -1372,10 +1375,62 @@ + return NULL_RTX; + + #if HAVE_conditional_move +- return emit_conditional_move (x, code, cmp_a, cmp_b, VOIDmode, +- vtrue, vfalse, GET_MODE (x), +- (code == LTU || code == GEU +- || code == LEU || code == GTU)); ++ unsignedp = (code == LTU || code == GEU ++ || code == LEU || code == GTU); ++ ++ target = emit_conditional_move (x, code, cmp_a, cmp_b, VOIDmode, ++ vtrue, vfalse, GET_MODE (x), ++ unsignedp); ++ if (target) ++ return target; ++ ++ /* We might be faced with a situation like: ++ ++ x = (reg:M TARGET) ++ vtrue = (subreg:M (reg:N VTRUE) BYTE) ++ vfalse = (subreg:M (reg:N VFALSE) BYTE) ++ ++ We can't do a conditional move in mode M, but it's possible that we ++ could do a conditional move in mode N instead and take a subreg of ++ the result. ++ ++ If we can't create new pseudos, though, don't bother. */ ++ if (reload_completed) ++ return NULL_RTX; ++ ++ if (GET_CODE (vtrue) == SUBREG && GET_CODE (vfalse) == SUBREG) ++ { ++ rtx reg_vtrue = SUBREG_REG (vtrue); ++ rtx reg_vfalse = SUBREG_REG (vfalse); ++ unsigned int byte_vtrue = SUBREG_BYTE (vtrue); ++ unsigned int byte_vfalse = SUBREG_BYTE (vfalse); ++ rtx promoted_target; ++ ++ if (GET_MODE (reg_vtrue) != GET_MODE (reg_vfalse) ++ || byte_vtrue != byte_vfalse ++ || (SUBREG_PROMOTED_VAR_P (vtrue) ++ != SUBREG_PROMOTED_VAR_P (vfalse)) ++ || (SUBREG_PROMOTED_UNSIGNED_P (vtrue) ++ != SUBREG_PROMOTED_UNSIGNED_P (vfalse))) ++ return NULL_RTX; ++ ++ promoted_target = gen_reg_rtx (GET_MODE (reg_vtrue)); ++ ++ target = emit_conditional_move (promoted_target, code, cmp_a, cmp_b, ++ VOIDmode, reg_vtrue, reg_vfalse, ++ GET_MODE (reg_vtrue), unsignedp); ++ /* Nope, couldn't do it in that mode either. */ ++ if (!target) ++ return NULL_RTX; ++ ++ target = gen_rtx_SUBREG (GET_MODE (vtrue), promoted_target, byte_vtrue); ++ SUBREG_PROMOTED_VAR_P (target) = SUBREG_PROMOTED_VAR_P (vtrue); ++ SUBREG_PROMOTED_UNSIGNED_SET (target, SUBREG_PROMOTED_UNSIGNED_P (vtrue)); ++ emit_move_insn (x, target); ++ return x; ++ } ++ else ++ return NULL_RTX; + #else + /* We'll never get here, as noce_process_if_block doesn't call the + functions involved. Ifdef code, however, should be discouraged + |