Josh Bleecher Snyder 43c87aa481 cmd/6g, cmd/8g, liblink: improve handling of float constants ... * Enable basic constant propagation for floats. The constant propagation is still not as aggressive as it could be. * Implement MOVSS $(0), Xx and MOVSD $(0), Xx as XORPS Xx, Xx. Sample code: func f32() float32 { var f float32 return f } func f64() float64 { var f float64 return f } Before: "".f32 t=1 size=32 value=0 args=0x8 locals=0x0 0x0000 00000 (demo.go:3) TEXT "".f32+0(SB),4,$0-8 0x0000 00000 (demo.go:3) FUNCDATA $0,gclocals·a7a3692b8e27e823add69ec4239ba55f+0(SB) 0x0000 00000 (demo.go:3) FUNCDATA $1,gclocals·3280bececceccd33cb74587feedb1f9f+0(SB) 0x0000 00000 (demo.go:3) MOVSS $f32.00000000+0(SB),X0 0x0008 00008 (demo.go:4) MOVSS $f32.00000000+0(SB),X0 0x0010 00016 (demo.go:5) MOVSS X0,"".~r0+8(FP) 0x0016 00022 (demo.go:5) RET , "".f64 t=1 size=32 value=0 args=0x8 locals=0x0 0x0000 00000 (demo.go:8) TEXT "".f64+0(SB),4,$0-8 0x0000 00000 (demo.go:8) FUNCDATA $0,gclocals·a7a3692b8e27e823add69ec4239ba55f+0(SB) 0x0000 00000 (demo.go:8) FUNCDATA $1,gclocals·3280bececceccd33cb74587feedb1f9f+0(SB) 0x0000 00000 (demo.go:8) MOVSD $f64.0000000000000000+0(SB),X0 0x0008 00008 (demo.go:9) MOVSD $f64.0000000000000000+0(SB),X0 0x0010 00016 (demo.go:10) MOVSD X0,"".~r0+8(FP) 0x0016 00022 (demo.go:10) RET , After: "".f32 t=1 size=16 value=0 args=0x8 locals=0x0 0x0000 00000 (demo.go:3) TEXT "".f32+0(SB),4,$0-8 0x0000 00000 (demo.go:3) FUNCDATA $0,gclocals·a7a3692b8e27e823add69ec4239ba55f+0(SB) 0x0000 00000 (demo.go:3) FUNCDATA $1,gclocals·3280bececceccd33cb74587feedb1f9f+0(SB) 0x0000 00000 (demo.go:3) XORPS X0,X0 0x0003 00003 (demo.go:5) MOVSS X0,"".~r0+8(FP) 0x0009 00009 (demo.go:5) RET , "".f64 t=1 size=16 value=0 args=0x8 locals=0x0 0x0000 00000 (demo.go:8) TEXT "".f64+0(SB),4,$0-8 0x0000 00000 (demo.go:8) FUNCDATA $0,gclocals·a7a3692b8e27e823add69ec4239ba55f+0(SB) 0x0000 00000 (demo.go:8) FUNCDATA $1,gclocals·3280bececceccd33cb74587feedb1f9f+0(SB) 0x0000 00000 (demo.go:8) XORPS X0,X0 0x0003 00003 (demo.go:10) MOVSD X0,"".~r0+8(FP) 0x0009 00009 (demo.go:10) RET , Change-Id: Ie9eb65e324af4f664153d0a7cd22bb16b0fba16d Reviewed-on: https://go-review.googlesource.com/2053 Reviewed-by: Russ Cox <rsc@golang.org>		2015-01-07 22:26:55 +00:00
..
asm5.c	build: adjustments for move from src/pkg to src	2014-09-08 00:06:45 -04:00
asm6.c	liblink: fix encoding of SETcc for amd64	2015-01-04 20:38:12 +00:00
asm8.c	runtime: faster aeshash implementation	2014-12-11 05:23:00 +00:00
asm9.c	liblink: fail for too-large register offset constants	2014-12-18 22:32:18 +00:00
data.c	liblink: require DATA lines to be ordered by offset, with no overlap	2014-10-14 23:25:12 -04:00
go.c
ld.c	liblink: support big-endian properly	2014-08-06 00:25:41 -04:00
list5.c	liblink, cmd/dist, cmd/5l: introduce %^ and move C_* constants.	2014-08-06 00:31:22 -04:00
list6.c	liblink: remove class from %#D formatter on 6l	2014-12-22 19:25:52 +00:00
list8.c	liblink: remove some gotos + other fixes	2014-07-21 17:38:48 -04:00
list9.c	[dev.cc] liblink: fix warnings on Plan 9	2014-11-21 20:56:33 +01:00
Makefile
obj5.c	Revert "liblink, cmd/ld, runtime: remove stackguard1"	2015-01-05 16:29:56 +00:00
obj6.c	cmd/6g, cmd/8g, liblink: improve handling of float constants	2015-01-07 22:26:55 +00:00
obj8.c	cmd/6g, cmd/8g, liblink: improve handling of float constants	2015-01-07 22:26:55 +00:00
obj9.c	Revert "liblink, cmd/ld, runtime: remove stackguard1"	2015-01-05 16:29:56 +00:00
obj.c	cmd/gc: record line number for auto-generated wrappers as <autogenerated>:1	2014-05-12 11:59:55 -04:00
objfile.c	Revert "liblink, cmd/ld, runtime: remove stackguard1"	2015-01-05 16:29:56 +00:00
pass.c	[dev.cc] liblink: don't patch jumps to jumps to symbols	2014-12-05 09:24:01 -05:00
pcln.c	liblink: fix precedence bug in pcdata comparison	2014-07-16 19:26:36 -04:00
sched9.c	[dev.power64] cmd/9a, cmd/9c, cmd/9l, liblink: import code from Vita Nuova.	2014-08-06 23:41:29 -04:00
sym.c	build: adjustments for move from src/pkg to src	2014-09-08 00:06:45 -04:00