https://gcc.gnu.org/bugzilla/show_bug.cgi?id=36602
--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> --- (In reply to Richard Biener from comment #11) > Created attachment 44963 [details] > updated patch > > Updated patch. There are the expected missing warnings plus the two missed > optimizations noted by the bugs this now depends on. Current fallout is FAIL: g++.dg/pr79095-2.C -std=gnu++14 (test for warnings, line ) FAIL: g++.dg/pr79095-2.C -std=gnu++17 (test for warnings, line ) FAIL: g++.dg/pr79095-2.C -std=gnu++98 (test for warnings, line ) FAIL: gcc.dg/builtin-object-size-4.c execution test FAIL: gcc.dg/builtin-stringop-chk-5.c (test for warnings, line 72) FAIL: gcc.dg/builtin-stringop-chk-5.c (test for warnings, line 75) FAIL: gcc.dg/builtin-stringop-chk-5.c (test for warnings, line 78) FAIL: gcc.dg/builtin-stringop-chk-5.c (test for warnings, line 81) FAIL: gcc.dg/builtin-stringop-chk-5.c (test for warnings, line 84) FAIL: gcc.dg/builtin-stringop-chk-5.c (test for warnings, line 87) FAIL: gcc.dg/builtin-stringop-chk-5.c (test for warnings, line 92) FAIL: gcc.dg/builtin-stringop-chk-5.c (test for warnings, line 95) FAIL: gcc.dg/builtin-stringop-chk-5.c (test for warnings, line 98) FAIL: gcc.dg/tm/memset.c scan-assembler _ITM_memsetW FAIL: gcc.dg/tree-ssa/calloc-3.c scan-tree-dump-not optimized "malloc" FAIL: gcc.dg/tree-ssa/calloc-3.c scan-tree-dump-times optimized "calloc" 1 -> PR87900 FAIL: gcc.dg/tree-ssa/ssa-dse-25.c scan-tree-dump dse1 "memset .&z, 0, 8." -> PR87901 and additionally with -m32 FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 101) FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 110) FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 111) FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 117) FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 118) FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 119) FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 153) FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 154) FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 155) FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 156) FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 157) FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 158) FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 46) FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 71) FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 72) FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 73) FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 74) FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 75) FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 76) FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 92) FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 96) FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 99) FAIL: gcc.dg/warn-strlen-no-nul.c (internal compiler error) FAIL: gcc.dg/warn-strlen-no-nul.c (test for excess errors) (the ICE looks latent, and thus may be the reason for the missed warnings) FAIL: gcc.dg/tree-ssa/builtin-sprintf-10.c (test for excess errors) Some of the missed warnings might be cured with careful placement of check_bounds_or_overlap calls in memset folding like we do for memcpy folding. But that's not exactly my area of expertise/interest. I will test a slightly less aggresive patch now.
