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Implement first D-specific optimization pass: -simplify-drtcalls.

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It uses the machinery of the standard -simplify-libcalls pass, but optimizes
calls to the D runtime instead of calls to C libraries.

At the moment, these optimizations are implemented by this pass:
 - Avoid the runtime call for `arr.length = newlen` if it can determine that
   the new length isn't longer than the old one.
 - Ditto for `cast(T[]) arr` if it will clearly always succeed.
   (e.g. if the length of the original array is zero, or if the old element
   size is a multiple of the new element size)
This commit is contained in:
Frits van Bommel
2009-04-28 21:58:06 +02:00
parent f712c48312
commit 0df1e34eb2
4 changed files with 286 additions and 2 deletions
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2
CMakeLists.txt
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@@ -135,7 +135,7 @@ include_directories(. ${DMDFE_PATH} ${DMDFE_PATH}/root ${PROJECT_BINARY_DIR}/${D
file(GLOB FE_SRC ${DMDFE_PATH}/*.c)
file(GLOB FE_SRC_ROOT ${DMDFE_PATH}/root/*.c)
file(GLOB GEN_SRC gen/*.cpp)
file(GLOB_RECURSE GEN_SRC gen/*.cpp)
file(GLOB IR_SRC ir/*.cpp)
# exclude idgen and impcnvgen and generated sources, just in case
list(REMOVE_ITEM FE_SRC