forked from OSchip/llvm-project
fa54acedd1
This patch adds optional fast-math-flags (the same that apply to fmul/fadd/fsub/fdiv/frem/fcmp) to call instructions in IR. Follow-up patches would use these flags in LibCallSimplifier, add support to clang, and extend FMF to the DAG for calls. Motivating example: %y = fmul fast float %x, %x %z = tail call float @sqrtf(float %y) We'd like to be able to optimize sqrt(x*x) into fabs(x). We do this today using a function-wide attribute for unsafe-math, but we really want to trigger on the instructions themselves: %z = tail call fast float @sqrtf(float %y) because in an LTO build it's possible that calls with fast semantics have been inlined into a function with non-fast semantics. The code changes and tests are based on the recent commits that added "notail": http://reviews.llvm.org/rL252368 and added FMF to fcmp: http://reviews.llvm.org/rL241901 Differential Revision: http://reviews.llvm.org/D14707 llvm-svn: 255555 |
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| .. | ||
| AttributesTest.cpp | ||
| CMakeLists.txt | ||
| ConstantRangeTest.cpp | ||
| ConstantsTest.cpp | ||
| DebugInfoTest.cpp | ||
| DominatorTreeTest.cpp | ||
| IRBuilderTest.cpp | ||
| InstructionsTest.cpp | ||
| LegacyPassManagerTest.cpp | ||
| MDBuilderTest.cpp | ||
| Makefile | ||
| MetadataTest.cpp | ||
| PassManagerTest.cpp | ||
| PatternMatch.cpp | ||
| TypeBuilderTest.cpp | ||
| TypesTest.cpp | ||
| UseTest.cpp | ||
| UserTest.cpp | ||
| ValueHandleTest.cpp | ||
| ValueMapTest.cpp | ||
| ValueTest.cpp | ||
| VerifierTest.cpp | ||
| WaymarkTest.cpp | ||