Cool! Evan
On Jan 4, 2008, at 5:04 PM, Chris Lattner wrote: > On Jan 4, 2008, at 4:41 PM, Evan Cheng wrote: >> Author: evancheng >> Date: Fri Jan 4 18:41:47 2008 >> New Revision: 45605 >> >> URL: http://llvm.org/viewvc/llvm-project?rev=45605&view=rev >> Log: >> Combine MovePCtoStack + POP32r into one instruction MOVPC32r so it >> can be moved if needed. > > Nice evan! With this, sinking is now able to compile code like this: > > int G; > int test(int X, int Y) { > if (X) > return G+Y; > return 0; > } > > into: > > _test: > cmpl $0, 4(%esp) > je LBB2_2 # UnifiedReturnBlock > LBB2_1: # cond_true > call "L2$pb" > "L2$pb": > popl %ecx > movl 8(%esp), %eax > movl L_G$non_lazy_ptr-"L2$pb"(%ecx), %ecx > addl (%ecx), %eax > ret > LBB2_2: # UnifiedReturnBlock > xorl %eax, %eax > ret > > instead of: > > _test: > call "L2$pb" > "L2$pb": > popl %ecx > cmpl $0, 4(%esp) > movl 8(%esp), %eax > je LBB2_2 # UnifiedReturnBlock > LBB2_1: # cond_true > movl L_G$non_lazy_ptr-"L2$pb"(%ecx), %ecx > addl (%ecx), %eax > ret > LBB2_2: # UnifiedReturnBlock > xorl %eax, %eax > ret > > > -Chris > _______________________________________________ > llvm-commits mailing list > llvm-commits@cs.uiuc.edu > http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits _______________________________________________ llvm-commits mailing list llvm-commits@cs.uiuc.edu http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits
