5 Commits

Author	SHA1	Message	Date
Evan Cheng	60108e96bb	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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108465 91177308-0d34-0410-b5e6-96231b3b80d8	2010-07-15 22:07:12 +00:00
Evan Cheng	218977b53e	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. ... git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108258 91177308-0d34-0410-b5e6-96231b3b80d8	2010-07-13 19:27:42 +00:00
Evan Cheng	5d115a0ff9	Check for FiniteOnlyFPMath as well. ... git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107904 91177308-0d34-0410-b5e6-96231b3b80d8	2010-07-08 20:12:24 +00:00
Evan Cheng	4ff7ab612c	r107852 is only safe with -enable-unsafe-fp-math to account for +0.0 == -0.0. ... git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107856 91177308-0d34-0410-b5e6-96231b3b80d8	2010-07-08 06:01:49 +00:00
Evan Cheng	515fe3a588	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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107852 91177308-0d34-0410-b5e6-96231b3b80d8	2010-07-08 02:08:50 +00:00