5 Commits

Author	SHA1	Message	Date
Evan Cheng	ffbae6ad52	Split -enable-finite-only-fp-math to two options: ... -enable-no-nans-fp-math and -enable-no-infs-fp-math. All of the current codegen fp math optimizations only care whether the fp arithmetics arguments and results can never be NaN. llvm-svn: 108465	2010-07-15 22:07:12 +00:00
Evan Cheng	069f1f7c9a	Extend the r107852 optimization which turns some fp compare to code sequence using only i32 operations. It now optimize some f64 compares when fp compare is exceptionally slow (e.g. cortex-a8). It also catches comparison against 0.0. ... llvm-svn: 108258	2010-07-13 19:27:42 +00:00
Evan Cheng	5307ec12d7	Check for FiniteOnlyFPMath as well. ... llvm-svn: 107904	2010-07-08 20:12:24 +00:00
Evan Cheng	3e8530bf14	r107852 is only safe with -enable-unsafe-fp-math to account for +0.0 == -0.0. ... llvm-svn: 107856	2010-07-08 06:01:49 +00:00
Evan Cheng	ed3f224f04	Optimize some vfp comparisons to integer ones. This patch implements the simplest case when the following conditions are met: ... 1. The arguments are f32. 2. The arguments are loads and they have no uses other than the comparison. 3. The comparison code is EQ or NE. e.g. vldr.32 s0, [r1] vldr.32 s1, [r0] vcmpe.f32 s1, s0 vmrs apsr_nzcv, fpscr beq LBB0_2 => ldr r1, [r1] ldr r0, [r0] cmp r0, r1 beq LBB0_2 More complicated cases will be implemented in subsequent patches. llvm-svn: 107852	2010-07-08 02:08:50 +00:00