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author | Chris Lattner <sabre@nondot.org> | 2007-04-02 06:34:44 +0000 |
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committer | Chris Lattner <sabre@nondot.org> | 2007-04-02 06:34:44 +0000 |
commit | 1ebd89eb6b4f5df8d8171ee654a73ecdf3f66580 (patch) | |
tree | 62a7a54bbb59c53accbb1cc33e275cd244c64634 /lib/Transforms/Scalar/LoopStrengthReduce.cpp | |
parent | 44ad85e0e89d56ca19c131aec6f840c4fc332163 (diff) | |
download | llvm-1ebd89eb6b4f5df8d8171ee654a73ecdf3f66580.tar.gz llvm-1ebd89eb6b4f5df8d8171ee654a73ecdf3f66580.tar.bz2 llvm-1ebd89eb6b4f5df8d8171ee654a73ecdf3f66580.tar.xz |
Pass the type of the store access, not the type of the store, into the
target hook. This allows us to codegen a loop as:
LBB1_1: @cond_next
mov r2, #0
str r2, [r0, +r3, lsl #2]
add r3, r3, #1
cmn r3, #1
bne LBB1_1 @cond_next
instead of:
LBB1_1: @cond_next
mov r2, #0
str r2, [r0], #+4
add r3, r3, #1
cmn r3, #1
bne LBB1_1 @cond_next
This looks the same, but has one fewer induction variable (and therefore,
one fewer register) live in the loop.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35592 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/Scalar/LoopStrengthReduce.cpp')
-rw-r--r-- | lib/Transforms/Scalar/LoopStrengthReduce.cpp | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/lib/Transforms/Scalar/LoopStrengthReduce.cpp index 9cb8d484de..744e0548ba 100644 --- a/lib/Transforms/Scalar/LoopStrengthReduce.cpp +++ b/lib/Transforms/Scalar/LoopStrengthReduce.cpp @@ -899,8 +899,15 @@ bool LoopStrengthReduce::ValidStride(int64_t Scale, Imm = SC->getValue()->getSExtValue(); else Imm = 0; - if (!TLI->isLegalAddressScaleAndImm(Scale, Imm, - UsersToProcess[i].Inst->getType())) + + // If this is a load or other access, pass the type of the access in. + const Type *AccessTy = Type::VoidTy; + if (StoreInst *SI = dyn_cast<StoreInst>(UsersToProcess[i].Inst)) + AccessTy = SI->getOperand(0)->getType(); + else if (LoadInst *LI = dyn_cast<LoadInst>(UsersToProcess[i].Inst)) + AccessTy = LI->getType(); + + if (!TLI->isLegalAddressScaleAndImm(Scale, Imm, AccessTy)) return false; } return true; |