Chris Lattner 476769498e implement an optimization to codegen c ? 1.0 : 2.0 as load { 2.0, 1.0 } + c*4. ... For 2009-03-07-FPConstSelect.ll we now produce: _f: xorl %eax, %eax testl %edi, %edi movl $4, %ecx cmovne %rax, %rcx leaq LCPI1_0(%rip), %rax movss (%rcx,%rax), %xmm0 ret previously we produced: _f: subl $4, %esp cmpl $0, 8(%esp) movss LCPI1_0, %xmm0 je LBB1_2 ## entry LBB1_1: ## entry movss LCPI1_1, %xmm0 LBB1_2: ## entry movss %xmm0, (%esp) flds (%esp) addl $4, %esp ret on PPC the code also improves to: _f: cntlzw r2, r3 srwi r2, r2, 5 li r3, lo16(LCPI1_0) slwi r2, r2, 2 addis r3, r3, ha16(LCPI1_0) lfsx f1, r3, r2 blr from: _f: li r2, lo16(LCPI1_1) cmplwi cr0, r3, 0 addis r2, r2, ha16(LCPI1_1) beq cr0, LBB1_2 ; entry LBB1_1: ; entry li r2, lo16(LCPI1_0) addis r2, r2, ha16(LCPI1_0) LBB1_2: ; entry lfs f1, 0(r2) blr This also improves the existing pic-cpool case from: foo: subl $12, %esp call .Lllvm$1.$piclabel .Lllvm$1.$piclabel: popl %eax addl $_GLOBAL_OFFSET_TABLE_ + [.-.Lllvm$1.$piclabel], %eax cmpl $0, 16(%esp) movsd .LCPI1_0@GOTOFF(%eax), %xmm0 je .LBB1_2 # entry .LBB1_1: # entry movsd .LCPI1_1@GOTOFF(%eax), %xmm0 .LBB1_2: # entry movsd %xmm0, (%esp) fldl (%esp) addl $12, %esp ret to: foo: call .Lllvm$1.$piclabel .Lllvm$1.$piclabel: popl %eax addl $_GLOBAL_OFFSET_TABLE_ + [.-.Lllvm$1.$piclabel], %eax xorl %ecx, %ecx cmpl $0, 4(%esp) movl $8, %edx cmovne %ecx, %edx fldl .LCPI1_0@GOTOFF(%eax,%edx) ret This triggers a few dozen times in spec FP 2000. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66358 91177308-0d34-0410-b5e6-96231b3b80d8		2009-03-08 01:51:30 +00:00
..
Analysis	Introduce new linkage types linkonce_odr, weak_odr, common_odr	2009-03-07 15:45:40 +00:00
Archive	Add the private linkage.	2009-01-15 20:18:42 +00:00
AsmParser	Introduce new linkage types linkonce_odr, weak_odr, common_odr	2009-03-07 15:45:40 +00:00
Bitcode	Introduce new linkage types linkonce_odr, weak_odr, common_odr	2009-03-07 15:45:40 +00:00
CodeGen	implement an optimization to codegen c ? 1.0 : 2.0 as load { 2.0, 1.0 } + c*4.	2009-03-08 01:51:30 +00:00
CompilerDriver	Reorganize llvmc code.	2009-03-02 09:01:14 +00:00
Debugger	Removed trailing whitespace from Makefiles.	2009-01-09 16:44:42 +00:00
ExecutionEngine	Introduce new linkage types linkonce_odr, weak_odr, common_odr	2009-03-07 15:45:40 +00:00
Linker	Introduce new linkage types linkonce_odr, weak_odr, common_odr	2009-03-07 15:45:40 +00:00
Support	Use c_str() to force the string to be nul-terminated.	2009-03-06 18:13:15 +00:00
System	When a crash signal is delivered do two things: remove all of our	2009-03-07 08:15:47 +00:00
Target	Introduce new linkage types linkonce_odr, weak_odr, common_odr	2009-03-07 15:45:40 +00:00
Transforms	fix a serious pessimization that Tron on IRC pointed out where we would	2009-03-07 23:32:02 +00:00
VMCore	Introduce new linkage types linkonce_odr, weak_odr, common_odr	2009-03-07 15:45:40 +00:00
Makefile	Reorganize llvmc code.	2009-03-02 09:01:14 +00:00