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Add spill/fill encodings for Intel ISAs.

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To begin with, these are catch-all encodings with a SIB byte and a
32-bit displacement, so they can access any stack slot via both the
stack pointer and the frame pointer.

In the future, we will add encodings for 8-bit displacements as well as
EBP-relative references without a SIB byte.
This commit is contained in:
Jakob Stoklund Olesen
2017-09-22 15:35:11 -07:00
parent 76eb7df9f0
commit 29dfcf5dfb
8 changed files with 217 additions and 6 deletions
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44
cranelift/filetests/isa/intel/binary64.cton
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@@ -14,6 +14,13 @@ function %I64() {
fn0 = function %foo()
sig0 = ()
; Use incoming_arg stack slots because they won't be relocated by the frame
; layout.
ss0 = incoming_arg 8, offset 0
ss1 = incoming_arg 1024, offset -1024
ss2 = incoming_arg 1024, offset -2048
ss3 = incoming_arg 8, offset -2056
ebb0:
; Integer Constants.
@@ -436,6 +443,22 @@ ebb0:
; asm: call *%r10
call_indirect sig0, v402() ; bin: 41 ff d2
; Spill / Fill.
; asm: movq %rcx, 1032(%rsp)
[-,ss1] v500 = spill v1 ; bin: 48 89 8c 24 00000408
; asm: movq %rsi, 1032(%rsp)
[-,ss1] v501 = spill v2 ; bin: 48 89 b4 24 00000408
; asm: movq %r10, 1032(%rsp)
[-,ss1] v502 = spill v3 ; bin: 4c 89 94 24 00000408
; asm: movq 1032(%rsp), %rcx
[-,%rcx] v510 = fill v500 ; bin: 48 8b 8c 24 00000408
; asm: movq 1032(%rsp), %rsi
[-,%rsi] v511 = fill v501 ; bin: 48 8b b4 24 00000408
; asm: movq 1032(%rsp), %r10
[-,%r10] v512 = fill v502 ; bin: 4c 8b 94 24 00000408
; asm: testq %rcx, %rcx
; asm: je ebb1
brz v1, ebb1 ; bin: 48 85 c9 74 1b
@@ -477,6 +500,11 @@ function %I32() {
fn0 = function %foo()
sig0 = ()
ss0 = incoming_arg 8, offset 0
ss1 = incoming_arg 1024, offset -1024
ss2 = incoming_arg 1024, offset -2048
ss3 = incoming_arg 8, offset -2056
ebb0:
; Integer Constants.
@@ -806,6 +834,22 @@ ebb0:
; asm: movzbl %dl, %esi
[-,%rsi] v351 = bint.i32 v301 ; bin: 0f b6 f2
; Spill / Fill.
; asm: movl %ecx, 1032(%rsp)
[-,ss1] v500 = spill v1 ; bin: 89 8c 24 00000408
; asm: movl %esi, 1032(%rsp)
[-,ss1] v501 = spill v2 ; bin: 89 b4 24 00000408
; asm: movl %r10d, 1032(%rsp)
[-,ss1] v502 = spill v3 ; bin: 44 89 94 24 00000408
; asm: movl 1032(%rsp), %ecx
[-,%rcx] v510 = fill v500 ; bin: 8b 8c 24 00000408
; asm: movl 1032(%rsp), %esi
[-,%rsi] v511 = fill v501 ; bin: 8b b4 24 00000408
; asm: movl 1032(%rsp), %r10d
[-,%r10] v512 = fill v502 ; bin: 44 8b 94 24 00000408
; asm: testl %ecx, %ecx
; asm: je ebb1x
brz v1, ebb1 ; bin: 85 c9 74 18