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| author | Kazu Hirata <kazu@cs.umass.edu> | 2004-10-12 17:14:42 +0000 |
|---|---|---|
| committer | Kazu Hirata <kazu@gcc.gnu.org> | 2004-10-12 17:14:42 +0000 |
| commit | c271ba771118b065187992424ccb86091a4e55a9 (patch) | |
| tree | 4e44d8868ea25f87b0037dec5b15628c61a1c0f3 /gcc | |
| parent | 22de4c3dfcc0d6443a131f3c13e24258eab37dd5 (diff) | |
| download | gcc-c271ba771118b065187992424ccb86091a4e55a9.zip gcc-c271ba771118b065187992424ccb86091a4e55a9.tar.gz gcc-c271ba771118b065187992424ccb86091a4e55a9.tar.bz2 | |
re PR rtl-optimization/17931 (andl and testb are not combined)
PR rtl-optimization/17931
* config/i386/i386.c (ix86_rtx_costs): Handle COMPARE with
ZERO_EXTRACT in it.
From-SVN: r88943
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/i386/i386.c | 15 |
2 files changed, 21 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index d91d260..6ac3aa1 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2004-10-12 Kazu Hirata <kazu@cs.umass.edu> + + PR rtl-optimization/17931 + * config/i386/i386.c (ix86_rtx_costs): Handle COMPARE with + ZERO_EXTRACT in it. + 2004-10-12 Richard Earnshaw <rearnsha@arm.com> * arm.c (arm_print_operand): Use output_operand_lossage where possible diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c index 540d390..ba51586 100644 --- a/gcc/config/i386/i386.c +++ b/gcc/config/i386/i386.c @@ -14326,6 +14326,21 @@ ix86_rtx_costs (rtx x, int code, int outer_code, int *total) *total = COSTS_N_INSNS (ix86_cost->add); return false; + case COMPARE: + if (GET_CODE (XEXP (x, 0)) == ZERO_EXTRACT + && XEXP (XEXP (x, 0), 1) == const1_rtx + && GET_CODE (XEXP (XEXP (x, 0), 2)) == CONST_INT + && XEXP (x, 1) == const0_rtx) + { + /* This kind of construct is implemented using test[bwl]. + Treat it as if we had an AND. */ + *total = (COSTS_N_INSNS (ix86_cost->add) + + rtx_cost (XEXP (XEXP (x, 0), 0), outer_code) + + rtx_cost (const1_rtx, outer_code)); + return true; + } + return false; + case FLOAT_EXTEND: if (!TARGET_SSE_MATH || !VALID_SSE_REG_MODE (mode)) *total = 0; |