mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-26 04:32:44 +01:00
d4c615be8c
Discussed here: http://lists.llvm.org/pipermail/llvm-dev/2018-January/120320.html In preparation for adding support for named vregs we are changing the sigil for physical registers in MIR to '$' from '%'. This will prevent name clashes of named physical register with named vregs. llvm-svn: 323922
64 lines
1.5 KiB
YAML
64 lines
1.5 KiB
YAML
# RUN: llc -march=hexagon -run-pass hwloops %s -o - | FileCheck %s
|
|
|
|
# Normally, if the registers holding the induction variable's bounds
|
|
# are redefined inside of the loop's body, the loop cannot be converted
|
|
# to a hardware loop. However, if the redefining instruction is actually
|
|
# loading an immediate value into the register, this conversion is both
|
|
# possible and legal (since the immediate itself will be used in the
|
|
# loop setup in the preheader).
|
|
|
|
# CHECK: [[R0:%[0-9]+]]:intregs = A2_tfrsi 1920
|
|
# CHECK: J2_loop0r %bb.1, [[R0]]
|
|
#
|
|
# CHECK: bb.1.b1 (address-taken):
|
|
# CHECK: ENDLOOP0 %bb.1
|
|
|
|
|
|
--- |
|
|
define void @fred() {
|
|
b0:
|
|
br label %b1
|
|
b1:
|
|
br label %b2
|
|
b2:
|
|
ret void
|
|
}
|
|
...
|
|
|
|
---
|
|
name: fred
|
|
tracksRegLiveness: true
|
|
registers:
|
|
- { id: 0, class: intregs }
|
|
- { id: 1, class: intregs }
|
|
- { id: 2, class: intregs }
|
|
- { id: 3, class: intregs }
|
|
- { id: 4, class: intregs }
|
|
- { id: 5, class: intregs }
|
|
- { id: 6, class: intregs }
|
|
- { id: 7, class: intregs }
|
|
- { id: 8, class: predregs }
|
|
body: |
|
|
bb.0.b0:
|
|
liveins: $r0
|
|
successors: %bb.1
|
|
%0 = A2_tfrsi 0
|
|
%1 = A2_tfrsi 0
|
|
%2 = COPY $r0
|
|
|
|
bb.1.b1:
|
|
successors: %bb.1, %bb.2
|
|
%3 = PHI %0, %bb.0, %6, %bb.1
|
|
%4 = PHI %1, %bb.0, %5, %bb.1
|
|
S4_storerh_rr %2, %4, 0, %3
|
|
%5 = A2_addi %4, 2
|
|
%6 = A2_addi %3, 1
|
|
; This definition of %7 should not prevent conversion to hardware loop.
|
|
%7 = A2_tfrsi 3840
|
|
%8 = C2_cmpeq %5, %7
|
|
J2_jumpf %8, %bb.1, implicit-def $pc
|
|
J2_jump %bb.2, implicit-def $pc
|
|
|
|
bb.2.b2:
|
|
...
|