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llvm-mirror/test/CodeGen/ARM/funnel-shift.ll
Simon Pilgrim 132f72d148 [DAG][ARM][MIPS][RISCV] Improve funnel shift promotion to use 'double shift' patterns 
Based on a discussion on D88783, if we're promoting a funnel shift to a width at least twice the size as the original type, then we can use the 'double shift' patterns (shifting the concatenated sources).

Differential Revision: https://reviews.llvm.org/D89139
2020-10-12 14:11:02 +01:00

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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=arm-eabi -mattr=+v6t2 | FileCheck %s --check-prefixes=CHECK,SCALAR
; RUN: llc < %s -mtriple=arm-eabi -mattr=+v6t2 -mattr=+neon | FileCheck %s --check-prefixes=CHECK,NEON
declare i8 @llvm.fshl.i8(i8, i8, i8)
declare i16 @llvm.fshl.i16(i16, i16, i16)
declare i32 @llvm.fshl.i32(i32, i32, i32)
declare i64 @llvm.fshl.i64(i64, i64, i64)
declare <4 x i32> @llvm.fshl.v4i32(<4 x i32>, <4 x i32>, <4 x i32>)
declare i8 @llvm.fshr.i8(i8, i8, i8)
declare i16 @llvm.fshr.i16(i16, i16, i16)
declare i32 @llvm.fshr.i32(i32, i32, i32)
declare i64 @llvm.fshr.i64(i64, i64, i64)
declare <4 x i32> @llvm.fshr.v4i32(<4 x i32>, <4 x i32>, <4 x i32>)
; General case - all operands can be variables.
define i16 @fshl_i16(i16 %x, i16 %y, i16 %z) {
; CHECK-LABEL: fshl_i16:
; CHECK: @ %bb.0:
; CHECK-NEXT: pkhbt r0, r1, r0, lsl #16
; CHECK-NEXT: and r1, r2, #15
; CHECK-NEXT: lsl r0, r0, r1
; CHECK-NEXT: lsr r0, r0, #16
; CHECK-NEXT: bx lr
%f = call i16 @llvm.fshl.i16(i16 %x, i16 %y, i16 %z)
ret i16 %f
}
define i32 @fshl_i32(i32 %x, i32 %y, i32 %z) {
; CHECK-LABEL: fshl_i32:
; CHECK: @ %bb.0:
; CHECK-NEXT: mov r3, #31
; CHECK-NEXT: lsr r1, r1, #1
; CHECK-NEXT: bic r3, r3, r2
; CHECK-NEXT: and r2, r2, #31
; CHECK-NEXT: lsl r0, r0, r2
; CHECK-NEXT: orr r0, r0, r1, lsr r3
; CHECK-NEXT: bx lr
%f = call i32 @llvm.fshl.i32(i32 %x, i32 %y, i32 %z)
ret i32 %f
}
; Verify that weird types are minimally supported.
declare i37 @llvm.fshl.i37(i37, i37, i37)
define i37 @fshl_i37(i37 %x, i37 %y, i37 %z) {
; CHECK-LABEL: fshl_i37:
; CHECK: @ %bb.0:
; CHECK-NEXT: .save {r4, r5, r6, r7, r8, lr}
; CHECK-NEXT: push {r4, r5, r6, r7, r8, lr}
; CHECK-NEXT: mov r8, r1
; CHECK-NEXT: mov r4, r0
; CHECK-NEXT: ldr r0, [sp, #24]
; CHECK-NEXT: mov r6, r3
; CHECK-NEXT: ldr r1, [sp, #28]
; CHECK-NEXT: mov r7, r2
; CHECK-NEXT: mov r2, #37
; CHECK-NEXT: mov r3, #0
; CHECK-NEXT: bl __aeabi_uldivmod
; CHECK-NEXT: mov r0, #63
; CHECK-NEXT: bic r1, r0, r2
; CHECK-NEXT: lsl r0, r6, #27
; CHECK-NEXT: lsl r3, r7, #27
; CHECK-NEXT: orr r0, r0, r7, lsr #5
; CHECK-NEXT: and r2, r2, #63
; CHECK-NEXT: lsrs r7, r0, #1
; CHECK-NEXT: rrx r0, r3
; CHECK-NEXT: rsb r3, r1, #32
; CHECK-NEXT: lsr r0, r0, r1
; CHECK-NEXT: lsl r6, r4, r2
; CHECK-NEXT: orr r0, r0, r7, lsl r3
; CHECK-NEXT: subs r3, r1, #32
; CHECK-NEXT: lsr r1, r7, r1
; CHECK-NEXT: lsrpl r0, r7, r3
; CHECK-NEXT: subs r5, r2, #32
; CHECK-NEXT: movwpl r6, #0
; CHECK-NEXT: orr r0, r6, r0
; CHECK-NEXT: rsb r6, r2, #32
; CHECK-NEXT: cmp r5, #0
; CHECK-NEXT: lsr r6, r4, r6
; CHECK-NEXT: orr r2, r6, r8, lsl r2
; CHECK-NEXT: lslpl r2, r4, r5
; CHECK-NEXT: cmp r3, #0
; CHECK-NEXT: movwpl r1, #0
; CHECK-NEXT: orr r1, r2, r1
; CHECK-NEXT: pop {r4, r5, r6, r7, r8, pc}
%f = call i37 @llvm.fshl.i37(i37 %x, i37 %y, i37 %z)
ret i37 %f
}
; extract(concat(0b1110000, 0b1111111) << 2) = 0b1000011
declare i7 @llvm.fshl.i7(i7, i7, i7)
define i7 @fshl_i7_const_fold() {
; CHECK-LABEL: fshl_i7_const_fold:
; CHECK: @ %bb.0:
; CHECK-NEXT: mov r0, #67
; CHECK-NEXT: bx lr
%f = call i7 @llvm.fshl.i7(i7 112, i7 127, i7 2)
ret i7 %f
}
define i8 @fshl_i8_const_fold_overshift_1() {
; CHECK-LABEL: fshl_i8_const_fold_overshift_1:
; CHECK: @ %bb.0:
; CHECK-NEXT: mov r0, #128
; CHECK-NEXT: bx lr
%f = call i8 @llvm.fshl.i8(i8 255, i8 0, i8 15)
ret i8 %f
}
define i8 @fshl_i8_const_fold_overshift_2() {
; CHECK-LABEL: fshl_i8_const_fold_overshift_2:
; CHECK: @ %bb.0:
; CHECK-NEXT: mov r0, #120
; CHECK-NEXT: bx lr
%f = call i8 @llvm.fshl.i8(i8 15, i8 15, i8 11)
ret i8 %f
}
define i8 @fshl_i8_const_fold_overshift_3() {
; CHECK-LABEL: fshl_i8_const_fold_overshift_3:
; CHECK: @ %bb.0:
; CHECK-NEXT: mov r0, #0
; CHECK-NEXT: bx lr
%f = call i8 @llvm.fshl.i8(i8 0, i8 225, i8 8)
ret i8 %f
}
; With constant shift amount, this is 'extr'.
define i32 @fshl_i32_const_shift(i32 %x, i32 %y) {
; CHECK-LABEL: fshl_i32_const_shift:
; CHECK: @ %bb.0:
; CHECK-NEXT: lsl r0, r0, #9
; CHECK-NEXT: orr r0, r0, r1, lsr #23
; CHECK-NEXT: bx lr
%f = call i32 @llvm.fshl.i32(i32 %x, i32 %y, i32 9)
ret i32 %f
}
; Check modulo math on shift amount.
define i32 @fshl_i32_const_overshift(i32 %x, i32 %y) {
; CHECK-LABEL: fshl_i32_const_overshift:
; CHECK: @ %bb.0:
; CHECK-NEXT: lsl r0, r0, #9
; CHECK-NEXT: orr r0, r0, r1, lsr #23
; CHECK-NEXT: bx lr
%f = call i32 @llvm.fshl.i32(i32 %x, i32 %y, i32 41)
ret i32 %f
}
; 64-bit should also work.
define i64 @fshl_i64_const_overshift(i64 %x, i64 %y) {
; CHECK-LABEL: fshl_i64_const_overshift:
; CHECK: @ %bb.0:
; CHECK-NEXT: lsr r1, r2, #23
; CHECK-NEXT: orr r2, r1, r3, lsl #9
; CHECK-NEXT: lsl r0, r0, #9
; CHECK-NEXT: orr r1, r0, r3, lsr #23
; CHECK-NEXT: mov r0, r2
; CHECK-NEXT: bx lr
%f = call i64 @llvm.fshl.i64(i64 %x, i64 %y, i64 105)
ret i64 %f
}
; This should work without any node-specific logic.
define i8 @fshl_i8_const_fold() {
; CHECK-LABEL: fshl_i8_const_fold:
; CHECK: @ %bb.0:
; CHECK-NEXT: mov r0, #128
; CHECK-NEXT: bx lr
%f = call i8 @llvm.fshl.i8(i8 255, i8 0, i8 7)
ret i8 %f
}
; Repeat everything for funnel shift right.
; General case - all operands can be variables.
define i16 @fshr_i16(i16 %x, i16 %y, i16 %z) {
; CHECK-LABEL: fshr_i16:
; CHECK: @ %bb.0:
; CHECK-NEXT: pkhbt r0, r1, r0, lsl #16
; CHECK-NEXT: and r1, r2, #15
; CHECK-NEXT: lsr r0, r0, r1
; CHECK-NEXT: bx lr
%f = call i16 @llvm.fshr.i16(i16 %x, i16 %y, i16 %z)
ret i16 %f
}
define i32 @fshr_i32(i32 %x, i32 %y, i32 %z) {
; CHECK-LABEL: fshr_i32:
; CHECK: @ %bb.0:
; CHECK-NEXT: mov r3, #31
; CHECK-NEXT: lsl r0, r0, #1
; CHECK-NEXT: bic r3, r3, r2
; CHECK-NEXT: and r2, r2, #31
; CHECK-NEXT: lsl r0, r0, r3
; CHECK-NEXT: orr r0, r0, r1, lsr r2
; CHECK-NEXT: bx lr
%f = call i32 @llvm.fshr.i32(i32 %x, i32 %y, i32 %z)
ret i32 %f
}
; Verify that weird types are minimally supported.
declare i37 @llvm.fshr.i37(i37, i37, i37)
define i37 @fshr_i37(i37 %x, i37 %y, i37 %z) {
; CHECK-LABEL: fshr_i37:
; CHECK: @ %bb.0:
; CHECK-NEXT: .save {r4, r5, r6, r7, r8, r9, r11, lr}
; CHECK-NEXT: push {r4, r5, r6, r7, r8, r9, r11, lr}
; CHECK-NEXT: mov r8, r1
; CHECK-NEXT: mov r9, r0
; CHECK-NEXT: ldr r0, [sp, #32]
; CHECK-NEXT: mov r6, r3
; CHECK-NEXT: ldr r1, [sp, #36]
; CHECK-NEXT: mov r7, r2
; CHECK-NEXT: mov r2, #37
; CHECK-NEXT: mov r3, #0
; CHECK-NEXT: bl __aeabi_uldivmod
; CHECK-NEXT: add r0, r2, #27
; CHECK-NEXT: lsl r6, r6, #27
; CHECK-NEXT: and r1, r0, #63
; CHECK-NEXT: lsl r2, r7, #27
; CHECK-NEXT: orr r7, r6, r7, lsr #5
; CHECK-NEXT: mov r6, #63
; CHECK-NEXT: rsb r3, r1, #32
; CHECK-NEXT: lsr r2, r2, r1
; CHECK-NEXT: subs r12, r1, #32
; CHECK-NEXT: bic r6, r6, r0
; CHECK-NEXT: orr r2, r2, r7, lsl r3
; CHECK-NEXT: lsl r5, r9, #1
; CHECK-NEXT: lsrpl r2, r7, r12
; CHECK-NEXT: lsl r0, r5, r6
; CHECK-NEXT: subs r4, r6, #32
; CHECK-NEXT: lsl r3, r8, #1
; CHECK-NEXT: movwpl r0, #0
; CHECK-NEXT: orr r3, r3, r9, lsr #31
; CHECK-NEXT: orr r0, r0, r2
; CHECK-NEXT: rsb r2, r6, #32
; CHECK-NEXT: cmp r4, #0
; CHECK-NEXT: lsr r1, r7, r1
; CHECK-NEXT: lsr r2, r5, r2
; CHECK-NEXT: orr r2, r2, r3, lsl r6
; CHECK-NEXT: lslpl r2, r5, r4
; CHECK-NEXT: cmp r12, #0
; CHECK-NEXT: movwpl r1, #0
; CHECK-NEXT: orr r1, r2, r1
; CHECK-NEXT: pop {r4, r5, r6, r7, r8, r9, r11, pc}
%f = call i37 @llvm.fshr.i37(i37 %x, i37 %y, i37 %z)
ret i37 %f
}
; extract(concat(0b1110000, 0b1111111) >> 2) = 0b0011111
declare i7 @llvm.fshr.i7(i7, i7, i7)
define i7 @fshr_i7_const_fold() {
; CHECK-LABEL: fshr_i7_const_fold:
; CHECK: @ %bb.0:
; CHECK-NEXT: mov r0, #31
; CHECK-NEXT: bx lr
%f = call i7 @llvm.fshr.i7(i7 112, i7 127, i7 2)
ret i7 %f
}
define i8 @fshr_i8_const_fold_overshift_1() {
; CHECK-LABEL: fshr_i8_const_fold_overshift_1:
; CHECK: @ %bb.0:
; CHECK-NEXT: mov r0, #254
; CHECK-NEXT: bx lr
%f = call i8 @llvm.fshr.i8(i8 255, i8 0, i8 15)
ret i8 %f
}
define i8 @fshr_i8_const_fold_overshift_2() {
; CHECK-LABEL: fshr_i8_const_fold_overshift_2:
; CHECK: @ %bb.0:
; CHECK-NEXT: mov r0, #225
; CHECK-NEXT: bx lr
%f = call i8 @llvm.fshr.i8(i8 15, i8 15, i8 11)
ret i8 %f
}
define i8 @fshr_i8_const_fold_overshift_3() {
; CHECK-LABEL: fshr_i8_const_fold_overshift_3:
; CHECK: @ %bb.0:
; CHECK-NEXT: mov r0, #255
; CHECK-NEXT: bx lr
%f = call i8 @llvm.fshr.i8(i8 0, i8 255, i8 8)
ret i8 %f
}
; With constant shift amount, this is 'extr'.
define i32 @fshr_i32_const_shift(i32 %x, i32 %y) {
; CHECK-LABEL: fshr_i32_const_shift:
; CHECK: @ %bb.0:
; CHECK-NEXT: lsl r0, r0, #23
; CHECK-NEXT: orr r0, r0, r1, lsr #9
; CHECK-NEXT: bx lr
%f = call i32 @llvm.fshr.i32(i32 %x, i32 %y, i32 9)
ret i32 %f
}
; Check modulo math on shift amount. 41-32=9.
define i32 @fshr_i32_const_overshift(i32 %x, i32 %y) {
; CHECK-LABEL: fshr_i32_const_overshift:
; CHECK: @ %bb.0:
; CHECK-NEXT: lsl r0, r0, #23
; CHECK-NEXT: orr r0, r0, r1, lsr #9
; CHECK-NEXT: bx lr
%f = call i32 @llvm.fshr.i32(i32 %x, i32 %y, i32 41)
ret i32 %f
}
; 64-bit should also work. 105-64 = 41.
define i64 @fshr_i64_const_overshift(i64 %x, i64 %y) {
; CHECK-LABEL: fshr_i64_const_overshift:
; CHECK: @ %bb.0:
; CHECK-NEXT: lsl r2, r0, #23
; CHECK-NEXT: lsl r1, r1, #23
; CHECK-NEXT: orr r2, r2, r3, lsr #9
; CHECK-NEXT: orr r1, r1, r0, lsr #9
; CHECK-NEXT: mov r0, r2
; CHECK-NEXT: bx lr
%f = call i64 @llvm.fshr.i64(i64 %x, i64 %y, i64 105)
ret i64 %f
}
; This should work without any node-specific logic.
define i8 @fshr_i8_const_fold() {
; CHECK-LABEL: fshr_i8_const_fold:
; CHECK: @ %bb.0:
; CHECK-NEXT: mov r0, #254
; CHECK-NEXT: bx lr
%f = call i8 @llvm.fshr.i8(i8 255, i8 0, i8 7)
ret i8 %f
}
define i32 @fshl_i32_shift_by_bitwidth(i32 %x, i32 %y) {
; CHECK-LABEL: fshl_i32_shift_by_bitwidth:
; CHECK: @ %bb.0:
; CHECK-NEXT: bx lr
%f = call i32 @llvm.fshl.i32(i32 %x, i32 %y, i32 32)
ret i32 %f
}
define i32 @fshr_i32_shift_by_bitwidth(i32 %x, i32 %y) {
; CHECK-LABEL: fshr_i32_shift_by_bitwidth:
; CHECK: @ %bb.0:
; CHECK-NEXT: mov r0, r1
; CHECK-NEXT: bx lr
%f = call i32 @llvm.fshr.i32(i32 %x, i32 %y, i32 32)
ret i32 %f
}
define <4 x i32> @fshl_v4i32_shift_by_bitwidth(<4 x i32> %x, <4 x i32> %y) {
; CHECK-LABEL: fshl_v4i32_shift_by_bitwidth:
; CHECK: @ %bb.0:
; CHECK-NEXT: bx lr
%f = call <4 x i32> @llvm.fshl.v4i32(<4 x i32> %x, <4 x i32> %y, <4 x i32> <i32 32, i32 32, i32 32, i32 32>)
ret <4 x i32> %f
}
define <4 x i32> @fshr_v4i32_shift_by_bitwidth(<4 x i32> %x, <4 x i32> %y) {
; SCALAR-LABEL: fshr_v4i32_shift_by_bitwidth:
; SCALAR: @ %bb.0:
; SCALAR-NEXT: ldm sp, {r0, r1, r2, r3}
; SCALAR-NEXT: bx lr
;
; NEON-LABEL: fshr_v4i32_shift_by_bitwidth:
; NEON: @ %bb.0:
; NEON-NEXT: mov r0, sp
; NEON-NEXT: vld1.64 {d16, d17}, [r0]
; NEON-NEXT: vmov r0, r1, d16
; NEON-NEXT: vmov r2, r3, d17
; NEON-NEXT: bx lr
%f = call <4 x i32> @llvm.fshr.v4i32(<4 x i32> %x, <4 x i32> %y, <4 x i32> <i32 32, i32 32, i32 32, i32 32>)
ret <4 x i32> %f
}
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