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11 Commits

Author SHA1 Message Date
Jim Grosbach
3812c82b92 ARM case-insensitive checking for APSR_nzcv. 
rdar://11056591

llvm-svn: 152846
 2012-03-15 21:34:14 +00:00
Jakob Stoklund Olesen
cfef07fd05 Fix RA-dependent test. 
llvm-svn: 151958
 2012-03-03 00:26:30 +00:00
Evan Cheng
31b407de17 Neuter the optimization I implemented with r107852 and r108258 which turn some 
floating point equality comparisons into integer ones with -ffast-math. The
issue is the optimization causes +0.0 != -0.0.

Now the optimization is only done when one side is known to be 0.0. The other
side's sign bit is masked off for the comparison.

rdar://10964603

llvm-svn: 151861
 2012-03-01 23:27:13 +00:00
Jim Grosbach
4a2f107b04 ARM VLDR/VSTR instructions don't need a size suffix. 
Canonicallize on the non-suffixed form, but continue to accept assembly that
has any correctly sized type suffix.

llvm-svn: 144583
 2011-11-14 23:03:21 +00:00
Jim Grosbach
039844acc5 LDRD/STRD instructions should print both Rt and Rt2 in the asm string. 
llvm-svn: 128736
 2011-04-01 20:26:57 +00:00
Bob Wilson
85dbc89f44 Radar 8803471: Fix expansion of ARM BCCi64 pseudo instructions. 
If the basic block containing the BCCi64 (or BCCZi64) instruction ends with
an unconditional branch, that branch needs to be deleted before appending
the expansion of the BCCi64 to the end of the block.

llvm-svn: 122521
 2010-12-23 22:45:49 +00:00
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