Duncan P. N. Exon Smith 3fdfffbfa3 GVN: Enable value forwarding for calloc ... Enable value forwarding for loads from `calloc()` without an intervening store. This change extends GVN to handle the following case: %1 = tail call noalias i8* @calloc(i64 1, i64 4) %2 = bitcast i8* %1 to i32* ; This load is trivially constant zero %3 = load i32* %2, align 4 This is analogous to the handling for `malloc()` in the same places. `malloc()` returns `undef`; `calloc()` returns a zero value. Note that it is correct to return zero even for out of bounds GEPs since the result of such a GEP would be undefined. Patch by Philip Reames! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210828 91177308-0d34-0410-b5e6-96231b3b80d8		2014-06-12 21:16:19 +00:00
..
2007-07-25-DominatedLoop.ll
2007-07-25-InfiniteLoop.ll
2007-07-25-Loop.ll
2007-07-25-NestedLoop.ll
2007-07-25-SinglePredecessor.ll
2007-07-26-InterlockingLoops.ll	Fix PR17952.	2013-11-11 22:00:23 +00:00
2007-07-26-NonRedundant.ll
2007-07-26-PhiErasure.ll
2007-07-30-PredIDom.ll
2007-07-31-NoDomInherit.ll
2007-07-31-RedundantPhi.ll
2008-02-12-UndefLoad.ll
2008-02-13-NewPHI.ll
2008-07-02-Unreachable.ll	Fix PR17952.	2013-11-11 22:00:23 +00:00
2008-12-09-SelfRemove.ll
2008-12-12-RLE-Crash.ll
2008-12-14-rle-reanalyze.ll
2008-12-15-CacheVisited.ll
2009-01-21-SortInvalidation.ll
2009-01-22-SortInvalidation.ll
2009-02-17-LoadPRECrash.ll
2009-03-10-PREOnVoid.ll	Reject alias to undefined symbols in the verifier.	2014-03-12 20:15:49 +00:00
2009-06-17-InvalidPRE.ll
2009-07-13-MemDepSortFail.ll
2009-11-12-MemDepMallocBitCast.ll
2010-03-31-RedundantPHIs.ll
2010-05-08-OneBit.ll
2010-11-13-Simplify.ll	Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change.	2013-07-14 01:42:54 +00:00
2011-04-27-phioperands.ll	Tests: rewrite 'opt ... %s' to 'opt ... < %s' so that opt does not emit a ModuleID	2013-01-01 13:57:25 +00:00
2011-06-01-NonLocalMemdepMiscompile.ll	Use variable for register name in test	2013-11-10 00:57:17 +00:00
2011-07-07-MatchIntrinsicExtract.ll	Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change.	2013-07-14 01:42:54 +00:00
2011-09-07-TypeIdFor.ll
2012-05-22-PreCrash.ll
atomic.ll
basic.ll
bitcast-of-call.ll
calloc-load-removal.ll	GVN: Enable value forwarding for calloc	2014-06-12 21:16:19 +00:00
calls-nonlocal.ll
calls-readonly.ll
commute.ll	Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change.	2013-07-14 01:42:54 +00:00
cond_br2.ll	Fix PR17952.	2013-11-11 22:00:23 +00:00
cond_br.ll	Fix PR17952.	2013-11-11 22:00:23 +00:00
condprop.ll	Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change.	2013-07-14 01:42:54 +00:00
crash-no-aa.ll	Tests: rewrite 'opt ... %s' to 'opt ... < %s' so that opt does not emit a ModuleID	2012-12-30 02:33:22 +00:00
crash.ll	Tests: rewrite 'opt ... %s' to 'opt ... < %s' so that opt does not emit a ModuleID	2012-12-30 02:33:22 +00:00
edge.ll	Catch more CHECK that can be converted to CHECK-LABEL in Transforms for easier debugging. No functionality change.	2013-07-14 01:50:49 +00:00
fpmath.ll	Tests: rewrite 'opt ... %s' to 'opt ... < %s' so that opt does not emit a ModuleID	2013-01-01 13:57:25 +00:00
lifetime-simple.ll
load-constant-mem.ll
load-pre-align.ll	Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change.	2013-07-14 01:42:54 +00:00
load-pre-licm.ll
load-pre-nonlocal.ll	[GVN] Pass the phi-translated address of a load instead of the untranslated	2014-05-02 17:59:17 +00:00
local-pre.ll	Fix PR17952.	2013-11-11 22:00:23 +00:00
lpre-call-wrap-2.ll	Tests: rewrite 'opt ... %s' to 'opt ... < %s' so that opt does not emit a ModuleID	2012-12-30 01:28:40 +00:00
lpre-call-wrap.ll	Tests: rewrite 'opt ... %s' to 'opt ... < %s' so that opt does not emit a ModuleID	2012-12-30 01:28:40 +00:00
malloc-load-removal.ll	MemoryBuiltins: Reinstate optimizing (uninitialized) loads from operator new.	2013-09-24 17:34:29 +00:00
MemdepMiscompile.ll	Memory Dependence Analysis: fix a miscompile that uses DT to approxmiate the	2013-01-04 19:19:47 +00:00
non-local-offset.ll	Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change.	2013-07-14 01:42:54 +00:00
nonescaping-malloc.ll	Revert the test moves from 176733. Use "REQUIRES: asserts" instead.	2013-03-12 16:27:52 +00:00
null-aliases-nothing.ll	llvm/test/Transforms/GVN/null-aliases-nothing.ll: Fix a RUN line not to emit ModuleID.	2012-12-30 00:33:26 +00:00
phi-translate-partial-alias.ll
phi-translate.ll	Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change.	2013-07-14 01:42:54 +00:00
pr10820.ll
pr12979.ll	Tests: rewrite 'opt ... %s' to 'opt ... < %s' so that opt does not emit a ModuleID	2013-01-01 13:57:25 +00:00
pr14166.ll	Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change.	2013-07-14 01:42:54 +00:00
pr17732.ll	IR: Do not canonicalize constant GEPs into an out-of-bounds array access	2013-11-07 22:15:53 +00:00
pr17852.ll	Add a testcase for pr17852.	2013-11-11 15:37:52 +00:00
pre-basic-add.ll
pre-compare.ll
pre-load.ll	Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change.	2013-07-14 01:42:54 +00:00
pre-single-pred.ll
preserve-tbaa.ll	TBAA: handle scalar TBAA format and struct-path aware TBAA format.	2013-09-27 18:34:27 +00:00
range.ll	Tests: rewrite 'opt ... %s' to 'opt ... < %s' so that opt does not emit a ModuleID	2013-01-01 13:57:25 +00:00
readattrs.ll	Catch more CHECK that can be converted to CHECK-LABEL in Transforms for easier debugging. No functionality change.	2013-07-14 01:50:49 +00:00
rle-must-alias.ll
rle-no-phi-translate.ll
rle-nonlocal.ll	Fix PR17952.	2013-11-11 22:00:23 +00:00
rle-phi-translate.ll	Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change.	2013-07-14 01:42:54 +00:00
rle-semidominated.ll	Fix PR17952.	2013-11-11 22:00:23 +00:00
rle.ll	Fix PR17952.	2013-11-11 22:00:23 +00:00
tbaa.ll	TBAA: handle scalar TBAA format and struct-path aware TBAA format.	2013-09-27 18:34:27 +00:00
unreachable_block_infinite_loop.ll	Fix broken CHECK lines.	2014-01-11 21:06:00 +00:00