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authorJosé Fonseca <jfonseca@vmware.com>2010-10-10 19:05:05 +0100
committerJosé Fonseca <jfonseca@vmware.com>2010-10-10 19:05:05 +0100
commit693667bf88abcb60332a6f94c8f06a9fe7d62613 (patch)
tree7aa32039aa5d12eb6d2b118adfaf43c5b2f93a08 /src/gallium/auxiliary/gallivm
parent48003f3567d2732cfab08186934c4261c0447c9c (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')
-rw-r--r--src/gallium/auxiliary/gallivm/lp_bld_flow.c62
-rw-r--r--src/gallium/auxiliary/gallivm/lp_bld_flow.h3
2 files changed, 23 insertions, 42 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);
}
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_flow.h b/src/gallium/auxiliary/gallivm/lp_bld_flow.h
index e21d9de280..e729ee6eaa 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_flow.h
+++ b/src/gallium/auxiliary/gallivm/lp_bld_flow.h
@@ -108,6 +108,7 @@ lp_build_mask_end(struct lp_build_mask_context *mask);
struct lp_build_loop_state
{
LLVMBasicBlockRef block;
+ LLVMValueRef counter_var;
LLVMValueRef counter;
};
@@ -128,7 +129,7 @@ void
lp_build_loop_end_cond(LLVMBuilderRef builder,
LLVMValueRef end,
LLVMValueRef step,
- int cond, /* LLVM condition */
+ LLVMIntPredicate cond,
struct lp_build_loop_state *state);