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| author | Bernd Schmidt <bernds@redhat.com> | 2016-11-24 12:16:47 +0000 |
|---|---|---|
| committer | Bernd Schmidt <bernds@gcc.gnu.org> | 2016-11-24 12:16:47 +0000 |
| commit | 7998af1f4bf876f7ccf10ce956859e3dc2183774 (patch) | |
| tree | 952d443daca7ea277e7ca3879914717f0d526990 /gcc | |
| parent | 21aaaf1e050fac4eb5edd66489cc5c6f1b332b75 (diff) | |
| download | gcc-7998af1f4bf876f7ccf10ce956859e3dc2183774.zip gcc-7998af1f4bf876f7ccf10ce956859e3dc2183774.tar.gz gcc-7998af1f4bf876f7ccf10ce956859e3dc2183774.tar.bz2 | |
re PR rtl-optimization/78120 (If conversion no longer performed)
PR rtl-optimization/78120
* config/i386/i386.c (ix86_rtx_costs): Fully handle SETs.
From-SVN: r242832
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/i386/i386.c | 19 |
2 files changed, 23 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 7a22234..8d9de43 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2016-11-24 Bernd Schmidt <bschmidt@redhat.com> + + PR rtl-optimization/78120 + * config/i386/i386.c (ix86_rtx_costs): Fully handle SETs. + 2016-11-24 Bin Cheng <bin.cheng@arm.com> * match.pd: Refine type conversion in result expr for below pattern: diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c index 3ccee08..0e8dda9 100644 --- a/gcc/config/i386/i386.c +++ b/gcc/config/i386/i386.c @@ -40293,6 +40293,7 @@ ix86_rtx_costs (rtx x, machine_mode mode, int outer_code_i, int opno, enum rtx_code code = GET_CODE (x); enum rtx_code outer_code = (enum rtx_code) outer_code_i; const struct processor_costs *cost = speed ? ix86_cost : &ix86_size_cost; + int src_cost; switch (code) { @@ -40303,7 +40304,23 @@ ix86_rtx_costs (rtx x, machine_mode mode, int outer_code_i, int opno, *total = ix86_set_reg_reg_cost (GET_MODE (SET_DEST (x))); return true; } - return false; + + if (register_operand (SET_SRC (x), VOIDmode)) + /* Avoid potentially incorrect high cost from rtx_costs + for non-tieable SUBREGs. */ + src_cost = 0; + else + { + src_cost = rtx_cost (SET_SRC (x), mode, SET, 1, speed); + + if (CONSTANT_P (SET_SRC (x))) + /* Constant costs assume a base value of COSTS_N_INSNS (1) and add + a small value, possibly zero for cheap constants. */ + src_cost += COSTS_N_INSNS (1); + } + + *total = src_cost + rtx_cost (SET_DEST (x), mode, SET, 0, speed); + return true; case CONST_INT: case CONST: |