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rustc: make llloadenv bb optional, kill 1.5% of emitted llvm insns.

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This commit is contained in:
Graydon Hoare 2012-11-15 14:51:45 -08:00
parent 9b6f025eb6
commit 1a2eaed43d
3 changed files with 26 additions and 8 deletions
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17
src/librustc/middle/trans/base.rs
View File

@ -1379,11 +1379,9 @@ fn arrayalloca(cx: block, t: TypeRef, v: ValueRef) -> ValueRef {
// Creates the standard set of basic blocks for a function
fn mk_standard_basic_blocks(llfn: ValueRef) ->
{sa: BasicBlockRef, ca: BasicBlockRef, rt: BasicBlockRef} {
{sa: BasicBlockRef, rt: BasicBlockRef} {
{sa: str::as_c_str(~"static_allocas",
|buf| llvm::LLVMAppendBasicBlock(llfn, buf)),
ca: str::as_c_str(~"load_env",
|buf| llvm::LLVMAppendBasicBlock(llfn, buf)),
rt: str::as_c_str(~"return",
|buf| llvm::LLVMAppendBasicBlock(llfn, buf))}
}
@ -1407,7 +1405,7 @@ fn new_fn_ctxt_w_id(ccx: @crate_ctxt,
llenv: llvm::LLVMGetParam(llfndecl, 1u as c_uint),
llretptr: llvm::LLVMGetParam(llfndecl, 0u as c_uint),
mut llstaticallocas: llbbs.sa,
mut llloadenv: llbbs.ca,
mut llloadenv: None,
mut llreturn: llbbs.rt,
mut llself: None,
mut personality: None,
@ -1560,8 +1558,15 @@ fn finish_fn(fcx: fn_ctxt, lltop: BasicBlockRef) {
fn tie_up_header_blocks(fcx: fn_ctxt, lltop: BasicBlockRef) {
let _icx = fcx.insn_ctxt("tie_up_header_blocks");
Br(raw_block(fcx, false, fcx.llstaticallocas), fcx.llloadenv);
Br(raw_block(fcx, false, fcx.llloadenv), lltop);
match fcx.llloadenv {
Some(copy ll) => {
Br(raw_block(fcx, false, fcx.llstaticallocas), ll);
Br(raw_block(fcx, false, ll), lltop);
}
None => {
Br(raw_block(fcx, false, fcx.llstaticallocas), lltop);
}
}
}
enum self_arg { impl_self(ty::t), impl_owned_self(ty::t), no_self, }

15
src/librustc/middle/trans/closure.rs
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@ -316,7 +316,20 @@ fn load_environment(fcx: fn_ctxt,
load_ret_handle: bool,
proto: ast::Proto) {
let _icx = fcx.insn_ctxt("closure::load_environment");
let bcx = raw_block(fcx, false, fcx.llloadenv);
let llloadenv = match fcx.llloadenv {
Some(ll) => ll,
None => {
let ll =
str::as_c_str(~"load_env",
|buf|
llvm::LLVMAppendBasicBlock(fcx.llfn, buf));
fcx.llloadenv = Some(ll);
ll
}
};
let bcx = raw_block(fcx, false, llloadenv);
// Load a pointer to the closure data, skipping over the box header:
let llcdata = base::opaque_box_body(bcx, cdata_ty, fcx.llenv);

2
src/librustc/middle/trans/common.rs
View File

@ -228,7 +228,7 @@ type fn_ctxt = @{
// already allocated by code in one of the llallocas blocks.
// (LLVM requires that arguments be copied to local allocas before
// allowing most any operation to be performed on them.)
mut llloadenv: BasicBlockRef,
mut llloadenv: Option<BasicBlockRef>,
mut llreturn: BasicBlockRef,
// The 'self' value currently in use in this function, if there
// is one.