diff options
Diffstat (limited to 'gcc/doc/invoke.texi')
| -rw-r--r-- | gcc/doc/invoke.texi | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 4d0124f..242eed7d 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -405,7 +405,7 @@ Objective-C and Objective-C++ Dialects}. -fsingle-precision-constant -fsplit-ivs-in-unroller -fsplit-loops@gol -fsplit-paths @gol -fsplit-wide-types -fssa-backprop -fssa-phiopt @gol --fstdarg-opt -fstrict-aliasing @gol +-fstdarg-opt -fstore-merging -fstrict-aliasing @gol -fstrict-overflow -fthread-jumps -ftracer -ftree-bit-ccp @gol -ftree-builtin-call-dce -ftree-ccp -ftree-ch @gol -ftree-coalesce-vars -ftree-copy-prop -ftree-dce -ftree-dominator-opts @gol @@ -416,8 +416,8 @@ Objective-C and Objective-C++ Dialects}. -ftree-loop-vectorize @gol -ftree-parallelize-loops=@var{n} -ftree-pre -ftree-partial-pre -ftree-pta @gol -ftree-reassoc -ftree-sink -ftree-slsr -ftree-sra @gol --ftree-switch-conversion -ftree-tail-merge -ftree-ter @gol --ftree-vectorize -ftree-vrp -funconstrained-commons @gol +-ftree-switch-conversion -ftree-tail-merge @gol +-ftree-ter -ftree-vectorize -ftree-vrp -funconstrained-commons @gol -funit-at-a-time -funroll-all-loops -funroll-loops @gol -funsafe-math-optimizations -funswitch-loops @gol -fipa-ra -fvariable-expansion-in-unroller -fvect-cost-model -fvpt @gol @@ -6753,6 +6753,7 @@ compilation time. -fsplit-wide-types @gol -fssa-backprop @gol -fssa-phiopt @gol +-fstore-merging @gol -ftree-bit-ccp @gol -ftree-ccp @gol -ftree-ch @gol @@ -8095,6 +8096,13 @@ Perform scalar replacement of aggregates. This pass replaces structure references with scalars to prevent committing structures to memory too early. This flag is enabled by default at @option{-O} and higher. +@item -fstore-merging +@opindex fstore-merging +Perform merging of narrow stores to consecutive memory addresses. This pass +merges contiguous stores of immediate values narrower than a word into fewer +wider stores to reduce the number of instructions. This is enabled by default +at @option{-O} and higher. + @item -ftree-ter @opindex ftree-ter Perform temporary expression replacement during the SSA->normal phase. Single @@ -9573,6 +9581,14 @@ avoid quadratic behavior in tree tail merging. The default value is 10. The maximum amount of iterations of the pass over the function. This is used to limit compilation time in tree tail merging. The default value is 2. +@item store-merging-allow-unaligned +Allow the store merging pass to introduce unaligned stores if it is legal to +do so. The default value is 1. + +@item max-stores-to-merge +The maximum number of stores to attempt to merge into wider stores in the store +merging pass. The minimum value is 2 and the default is 64. + @item max-unrolled-insns The maximum number of instructions that a loop may have to be unrolled. If a loop is unrolled, this parameter also determines how many times |