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author | Rong Xu <xur@google.com> | 2014-07-21 16:47:22 -0700 |
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committer | Rong Xu <xur@google.com> | 2014-07-29 15:31:03 -0700 |
commit | 38a8aecfb882072900434499696b5c32a2274515 (patch) | |
tree | 2aac97f0ae24b03cd98c1a06e989c031c173f889 /gcc-4.9/gcc/df-problems.c | |
parent | c231900e5dcc14d8296bd9f62b45997a49d4d5e7 (diff) | |
download | toolchain_gcc-38a8aecfb882072900434499696b5c32a2274515.tar.gz toolchain_gcc-38a8aecfb882072900434499696b5c32a2274515.tar.bz2 toolchain_gcc-38a8aecfb882072900434499696b5c32a2274515.zip |
[4.9] Switch gcc-4.9 to use google/gcc-4_9 branch.
This source drop uses svn version r212828 of google/gcc-4.9 branch.
We also cherry-picked r213062, r213063 and r213064 to fix windows
build issues.
All gcc-4.9 patches before July 3rd are ported to google/gcc-4.9.
The following prior commits has not been merged to google branch yet.
(They are included in this commit).
e7af147f979e657fe2df00808e5b4319b0e088c6,
baf87df3cb2683649ba7e9872362a7e721117c23, and
c231900e5dcc14d8296bd9f62b45997a49d4d5e7.
Change-Id: I4bea3ea470387ff751c2be4cb0d4a12059b9299b
Diffstat (limited to 'gcc-4.9/gcc/df-problems.c')
-rw-r--r-- | gcc-4.9/gcc/df-problems.c | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/gcc-4.9/gcc/df-problems.c b/gcc-4.9/gcc/df-problems.c index 77f8c9922..a0b2175d2 100644 --- a/gcc-4.9/gcc/df-problems.c +++ b/gcc-4.9/gcc/df-problems.c @@ -42,6 +42,7 @@ along with GCC; see the file COPYING3. If not see #include "df.h" #include "except.h" #include "dce.h" +#include "basic-block.h" #include "valtrack.h" #include "dumpfile.h" @@ -59,6 +60,28 @@ static bitmap_head seen_in_insn; Utility functions. ----------------------------------------------------------------------------*/ +/* A helper function checking if UD/DU is large and dense. It returns true + if UD/DU can potentially consume huge amount of memory. Returns false + otherwise +*/ + +bool +df_check_ud_du_memory_usage (void) +{ + /* TODO: make this a target hook. The heuristic applies only to x86 in + m32 mode with -Os. In that mode 'push' instruction is used in argument + passing, with sp adjustment instruction after each function call. The + side effect is that the DU/UD becomes really dense. */ +#define DF_LARGE_FUNC 20000 + + if (optimize_size + && n_basic_blocks_for_fn (cfun) > DF_LARGE_FUNC) + return true; + + return false; +} + + /* Generic versions to get the void* version of the block info. Only used inside the problem instance vectors. */ @@ -4507,6 +4530,3 @@ df_md_add_problem (void) { df_add_problem (&problem_MD); } - - - |