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| author | Martin Sebor <msebor@redhat.com> | 2019-06-19 20:37:41 +0000 |
|---|---|---|
| committer | Martin Sebor <msebor@gcc.gnu.org> | 2019-06-19 14:37:41 -0600 |
| commit | 4b4a26731e96522a76a6f9fc6a253d41a29238ef (patch) | |
| tree | ead7cea0bd370d8f021fe8e4df8a2ff9ed11b09b /gcc/ChangeLog | |
| parent | 14fef000947916e55e5aa1bdd6d78a04ed78dde4 (diff) | |
| download | gcc-4b4a26731e96522a76a6f9fc6a253d41a29238ef.zip gcc-4b4a26731e96522a76a6f9fc6a253d41a29238ef.tar.gz gcc-4b4a26731e96522a76a6f9fc6a253d41a29238ef.tar.bz2 | |
PR tree-optimization/90626 - fold strcmp(a, b) == 0 to zero when one string length is exact and the other is unequal
gcc/ChangeLog:
PR tree-optimization/90626
* tree-ssa-strlen.c (strxcmp_unequal): New function.
(handle_builtin_string_cmp): Call it.
gcc/testsuite/ChangeLog:
PR tree-optimization/90626
* gcc.dg/strlenopt-65.c: New test.
* gcc.dg/strlenopt-66.c: New test.
* gcc.dg/strlenopt.h (strcmp, strncmp): Declare.
From-SVN: r272485
Diffstat (limited to 'gcc/ChangeLog')
| -rw-r--r-- | gcc/ChangeLog | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 6e9eced..bf5ae3e 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2019-06-19 Martin Sebor <msebor@redhat.com> + + PR tree-optimization/90626 + * tree-ssa-strlen.c (strxcmp_unequal): New function. + (handle_builtin_string_cmp): Call it. + 2019-06-19 Iain Sandoe <iain@sandoe.co.uk> * config/darwin.h (DRIVER_SELF_SPECS): Add RDYNAMIC, DARWIN_PIE_SPEC |