diff options
author | José Fonseca <jfonseca@vmware.com> | 2010-10-10 19:05:05 +0100 |
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committer | José Fonseca <jfonseca@vmware.com> | 2010-10-10 19:05:05 +0100 |
commit | 693667bf88abcb60332a6f94c8f06a9fe7d62613 (patch) | |
tree | 7aa32039aa5d12eb6d2b118adfaf43c5b2f93a08 /src/gallium/auxiliary/gallivm/lp_bld_flow.c | |
parent | 48003f3567d2732cfab08186934c4261c0447c9c (diff) |
gallivm: Use variables instead of Phis in loops.
With this commit all explicit Phi emission is now gone.
Diffstat (limited to 'src/gallium/auxiliary/gallivm/lp_bld_flow.c')
-rw-r--r-- | src/gallium/auxiliary/gallivm/lp_bld_flow.c | 62 |
1 files changed, 21 insertions, 41 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_flow.c b/src/gallium/auxiliary/gallivm/lp_bld_flow.c index 9d1a74f5d1..f9d061fcb4 100644 --- a/src/gallium/auxiliary/gallivm/lp_bld_flow.c +++ b/src/gallium/auxiliary/gallivm/lp_bld_flow.c @@ -201,59 +201,27 @@ lp_build_loop_begin(LLVMBuilderRef builder, LLVMValueRef start, struct lp_build_loop_state *state) { - LLVMBasicBlockRef block = LLVMGetInsertBlock(builder); - LLVMValueRef function = LLVMGetBasicBlockParent(block); + state->block = lp_build_insert_new_block(builder, "loop_begin"); + + state->counter_var = lp_build_alloca(builder, LLVMTypeOf(start), "loop_counter"); - state->block = LLVMAppendBasicBlock(function, "loop"); + LLVMBuildStore(builder, start, state->counter_var); LLVMBuildBr(builder, state->block); LLVMPositionBuilderAtEnd(builder, state->block); - state->counter = LLVMBuildPhi(builder, LLVMTypeOf(start), ""); - - LLVMAddIncoming(state->counter, &start, &block, 1); - + state->counter = LLVMBuildLoad(builder, state->counter_var, ""); } void -lp_build_loop_end(LLVMBuilderRef builder, - LLVMValueRef end, - LLVMValueRef step, - struct lp_build_loop_state *state) -{ - LLVMBasicBlockRef block = LLVMGetInsertBlock(builder); - LLVMValueRef function = LLVMGetBasicBlockParent(block); - LLVMValueRef next; - LLVMValueRef cond; - LLVMBasicBlockRef after_block; - - if (!step) - step = LLVMConstInt(LLVMTypeOf(end), 1, 0); - - next = LLVMBuildAdd(builder, state->counter, step, ""); - - cond = LLVMBuildICmp(builder, LLVMIntNE, next, end, ""); - - after_block = LLVMAppendBasicBlock(function, ""); - - LLVMBuildCondBr(builder, cond, after_block, state->block); - - LLVMAddIncoming(state->counter, &next, &block, 1); - - LLVMPositionBuilderAtEnd(builder, after_block); -} - -void lp_build_loop_end_cond(LLVMBuilderRef builder, LLVMValueRef end, LLVMValueRef step, - int llvm_cond, + LLVMIntPredicate llvm_cond, struct lp_build_loop_state *state) { - LLVMBasicBlockRef block = LLVMGetInsertBlock(builder); - LLVMValueRef function = LLVMGetBasicBlockParent(block); LLVMValueRef next; LLVMValueRef cond; LLVMBasicBlockRef after_block; @@ -263,15 +231,27 @@ lp_build_loop_end_cond(LLVMBuilderRef builder, next = LLVMBuildAdd(builder, state->counter, step, ""); + LLVMBuildStore(builder, next, state->counter_var); + cond = LLVMBuildICmp(builder, llvm_cond, next, end, ""); - after_block = LLVMAppendBasicBlock(function, ""); + after_block = lp_build_insert_new_block(builder, "loop_end"); LLVMBuildCondBr(builder, cond, after_block, state->block); - LLVMAddIncoming(state->counter, &next, &block, 1); - LLVMPositionBuilderAtEnd(builder, after_block); + + state->counter = LLVMBuildLoad(builder, state->counter_var, ""); +} + + +void +lp_build_loop_end(LLVMBuilderRef builder, + LLVMValueRef end, + LLVMValueRef step, + struct lp_build_loop_state *state) +{ + lp_build_loop_end_cond(builder, end, step, LLVMIntNE, state); } |