2012-01-06 22:19:37 +00:00
|
|
|
; RUN: llc < %s -mcpu=cortex-a8 -align-neon-spills=0 | FileCheck %s
|
|
|
|
|
; RUN: llc < %s -mcpu=cortex-a8 -align-neon-spills=1 | FileCheck %s --check-prefix=NEON
|
2011-12-20 22:15:04 +00:00
|
|
|
target datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:32:64-v128:32:128-a0:0:32-n32-S32"
|
|
|
|
|
target triple = "thumbv7-apple-ios"
|
|
|
|
|
|
|
|
|
|
; CHECK: f
|
|
|
|
|
; This function is forced to spill a double.
|
|
|
|
|
; Verify that the spill slot is properly aligned.
|
|
|
|
|
;
|
|
|
|
|
; The caller-saved r4 is used as a scratch register for stack realignment.
|
|
|
|
|
; CHECK: push {r4, r7, lr}
|
|
|
|
|
; CHECK: bic r4, r4, #7
|
|
|
|
|
; CHECK: mov sp, r4
|
|
|
|
|
define void @f(double* nocapture %p) nounwind ssp {
|
|
|
|
|
entry:
|
|
|
|
|
%0 = load double* %p, align 4
|
|
|
|
|
tail call void asm sideeffect "", "~{d8},~{d9},~{d10},~{d11},~{d12},~{d13},~{d14},~{d15}"() nounwind
|
|
|
|
|
tail call void @g() nounwind
|
|
|
|
|
store double %0, double* %p, align 4
|
|
|
|
|
ret void
|
|
|
|
|
}
|
|
|
|
|
|
2011-12-23 00:36:18 +00:00
|
|
|
; NEON: f
|
|
|
|
|
; NEON: push {r4, r7, lr}
|
|
|
|
|
; NEON: sub.w r4, sp, #64
|
|
|
|
|
; NEON: bic r4, r4, #15
|
|
|
|
|
; Stack pointer must be updated before the spills.
|
|
|
|
|
; NEON: mov sp, r4
|
2013-02-22 10:01:33 +00:00
|
|
|
; NEON: vst1.64 {d8, d9, d10, d11}, [r4:128]!
|
|
|
|
|
; NEON: vst1.64 {d12, d13, d14, d15}, [r4:128]
|
2011-12-23 00:36:18 +00:00
|
|
|
; Stack pointer adjustment for the stack frame contents.
|
|
|
|
|
; This could legally happen before the spills.
|
|
|
|
|
; Since the spill slot is only 8 bytes, technically it would be fine to only
|
|
|
|
|
; subtract #8 here. That would leave sp less aligned than some stack slots,
|
|
|
|
|
; and would probably blow MFI's mind.
|
|
|
|
|
; NEON: sub sp, #16
|
|
|
|
|
; The epilog is free to use another scratch register than r4.
|
|
|
|
|
; NEON: add r[[R4:[0-9]+]], sp, #16
|
2013-02-22 10:01:33 +00:00
|
|
|
; NEON: vld1.64 {d8, d9, d10, d11}, [r[[R4]]:128]!
|
|
|
|
|
; NEON: vld1.64 {d12, d13, d14, d15}, [r[[R4]]:128]
|
2011-12-23 00:36:18 +00:00
|
|
|
; The stack pointer restore must happen after the reloads.
|
|
|
|
|
; NEON: mov sp,
|
|
|
|
|
; NEON: pop
|
|
|
|
|
|
2011-12-20 22:15:04 +00:00
|
|
|
declare void @g()
|
2011-12-23 00:36:18 +00:00
|
|
|
|
|
|
|
|
; Spill 7 d-registers.
|
|
|
|
|
define void @f7(double* nocapture %p) nounwind ssp {
|
|
|
|
|
entry:
|
|
|
|
|
tail call void asm sideeffect "", "~{d8},~{d9},~{d10},~{d11},~{d12},~{d13},~{d14}"() nounwind
|
|
|
|
|
ret void
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
; NEON: f7
|
|
|
|
|
; NEON: push {r4, r7, lr}
|
|
|
|
|
; NEON: sub.w r4, sp, #56
|
|
|
|
|
; NEON: bic r4, r4, #15
|
|
|
|
|
; Stack pointer must be updated before the spills.
|
|
|
|
|
; NEON: mov sp, r4
|
2013-02-22 10:01:33 +00:00
|
|
|
; NEON: vst1.64 {d8, d9, d10, d11}, [r4:128]!
|
|
|
|
|
; NEON: vst1.64 {d12, d13}, [r4:128]
|
2011-12-23 00:36:18 +00:00
|
|
|
; NEON: vstr d14, [r4, #16]
|
|
|
|
|
; Epilog
|
|
|
|
|
; NEON: vld1.64 {d8, d9, d10, d11},
|
|
|
|
|
; NEON: vld1.64 {d12, d13},
|
|
|
|
|
; NEON: vldr d14,
|
|
|
|
|
; The stack pointer restore must happen after the reloads.
|
|
|
|
|
; NEON: mov sp,
|
|
|
|
|
; NEON: pop
|
|
|
|
|
|
|
|
|
|
; Spill 7 d-registers, leave a hole.
|
|
|
|
|
define void @f3plus4(double* nocapture %p) nounwind ssp {
|
|
|
|
|
entry:
|
|
|
|
|
tail call void asm sideeffect "", "~{d8},~{d9},~{d10},~{d12},~{d13},~{d14},~{d15}"() nounwind
|
|
|
|
|
ret void
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
; Aligned spilling only works for contiguous ranges starting from d8.
|
|
|
|
|
; The rest goes to the standard vpush instructions.
|
|
|
|
|
; NEON: f3plus4
|
|
|
|
|
; NEON: push {r4, r7, lr}
|
|
|
|
|
; NEON: vpush {d12, d13, d14, d15}
|
|
|
|
|
; NEON: sub.w r4, sp, #24
|
|
|
|
|
; NEON: bic r4, r4, #15
|
|
|
|
|
; Stack pointer must be updated before the spills.
|
|
|
|
|
; NEON: mov sp, r4
|
2013-02-22 10:01:33 +00:00
|
|
|
; NEON: vst1.64 {d8, d9}, [r4:128]
|
2011-12-23 00:36:18 +00:00
|
|
|
; NEON: vstr d10, [r4, #16]
|
|
|
|
|
; Epilog
|
|
|
|
|
; NEON: vld1.64 {d8, d9},
|
|
|
|
|
; NEON: vldr d10, [{{.*}}, #16]
|
|
|
|
|
; The stack pointer restore must happen after the reloads.
|
|
|
|
|
; NEON: mov sp,
|
|
|
|
|
; NEON: vpop {d12, d13, d14, d15}
|
|
|
|
|
; NEON: pop
|
