; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=arm-eabi -arm-atomic-cfg-tidy=0 %s -o - | FileCheck -check-prefix=ARM %s
; RUN: llc -mtriple=thumb-eabi -arm-atomic-cfg-tidy=0 %s -o - | FileCheck -check-prefix=THUMB %s
; RUN: llc -mtriple=thumb-eabi -arm-atomic-cfg-tidy=0 -mcpu=arm1156t2-s -mattr=+thumb2 %s -o - | FileCheck -check-prefix=T2 %s
; RUN: llc -mtriple=thumbv8-eabi -arm-atomic-cfg-tidy=0 %s -o - | FileCheck -check-prefix=V8 %s
; FIXME: The -mtriple=thumb test doesn't change if -disable-peephole is specified.
%struct.Foo = type { ptr }
define ptr @foo(ptr %this, i32 %acc) nounwind readonly align 2 {
; ARM-LABEL: foo:
; ARM: @ %bb.0: @ %entry
; ARM-NEXT: add r2, r0, #4
; ARM-NEXT: mov r12, #1
; ARM-NEXT: b .LBB0_3
; ARM-NEXT: .LBB0_1: @ %tailrecurse.switch
; ARM-NEXT: @ in Loop: Header=BB0_3 Depth=1
; ARM-NEXT: cmp r3, #1
; ARM-NEXT: movne pc, lr
; ARM-NEXT: .LBB0_2: @ %sw.bb
; ARM-NEXT: @ in Loop: Header=BB0_3 Depth=1
; ARM-NEXT: orr r1, r3, r1, lsl #1
; ARM-NEXT: add r2, r2, #4
; ARM-NEXT: add r12, r12, #1
; ARM-NEXT: .LBB0_3: @ %tailrecurse
; ARM-NEXT: @ =>This Inner Loop Header: Depth=1
; ARM-NEXT: ldr r3, [r2, #-4]
; ARM-NEXT: ands r3, r3, #3
; ARM-NEXT: beq .LBB0_2
; ARM-NEXT: @ %bb.4: @ %tailrecurse.switch
; ARM-NEXT: @ in Loop: Header=BB0_3 Depth=1
; ARM-NEXT: cmp r3, #3
; ARM-NEXT: moveq r0, r2
; ARM-NEXT: moveq pc, lr
; ARM-NEXT: .LBB0_5: @ %tailrecurse.switch
; ARM-NEXT: @ in Loop: Header=BB0_3 Depth=1
; ARM-NEXT: cmp r3, #2
; ARM-NEXT: bne .LBB0_1
; ARM-NEXT: @ %bb.6: @ %sw.bb8
; ARM-NEXT: add r1, r1, r12
; ARM-NEXT: add r0, r0, r1, lsl #2
; ARM-NEXT: mov pc, lr
;
; THUMB-LABEL: foo:
; THUMB: @ %bb.0: @ %entry
; THUMB-NEXT: .save {r4, r5, r7, lr}
; THUMB-NEXT: push {r4, r5, r7, lr}
; THUMB-NEXT: movs r2, #1
; THUMB-NEXT: movs r3, r0
; THUMB-NEXT: .LBB0_1: @ %tailrecurse
; THUMB-NEXT: @ =>This Inner Loop Header: Depth=1
; THUMB-NEXT: ldr r5, [r3]
; THUMB-NEXT: movs r4, #3
; THUMB-NEXT: ands r4, r5
; THUMB-NEXT: beq .LBB0_5
; THUMB-NEXT: @ %bb.2: @ %tailrecurse.switch
; THUMB-NEXT: @ in Loop: Header=BB0_1 Depth=1
; THUMB-NEXT: cmp r4, #3
; THUMB-NEXT: beq .LBB0_6
; THUMB-NEXT: @ %bb.3: @ %tailrecurse.switch
; THUMB-NEXT: @ in Loop: Header=BB0_1 Depth=1
; THUMB-NEXT: cmp r4, #2
; THUMB-NEXT: beq .LBB0_7
; THUMB-NEXT: @ %bb.4: @ %tailrecurse.switch
; THUMB-NEXT: @ in Loop: Header=BB0_1 Depth=1
; THUMB-NEXT: cmp r4, #1
; THUMB-NEXT: bne .LBB0_9
; THUMB-NEXT: .LBB0_5: @ %sw.bb
; THUMB-NEXT: @ in Loop: Header=BB0_1 Depth=1
; THUMB-NEXT: lsls r1, r1, #1
; THUMB-NEXT: orrs r4, r1
; THUMB-NEXT: adds r3, r3, #4
; THUMB-NEXT: adds r2, r2, #1
; THUMB-NEXT: movs r1, r4
; THUMB-NEXT: b .LBB0_1
; THUMB-NEXT: .LBB0_6: @ %sw.bb6
; THUMB-NEXT: adds r0, r3, #4
; THUMB-NEXT: b .LBB0_8
; THUMB-NEXT: .LBB0_7: @ %sw.bb8
; THUMB-NEXT: adds r1, r1, r2
; THUMB-NEXT: lsls r1, r1, #2
; THUMB-NEXT: adds r0, r0, r1
; THUMB-NEXT: .LBB0_8: @ %sw.bb6
; THUMB-NEXT: pop {r4, r5, r7}
; THUMB-NEXT: pop {r1}
; THUMB-NEXT: bx r1
; THUMB-NEXT: .LBB0_9: @ %sw.epilog
; THUMB-NEXT: pop {r4, r5, r7}
; THUMB-NEXT: pop {r0}
; THUMB-NEXT: bx r0
;
; T2-LABEL: foo:
; T2: @ %bb.0: @ %entry
; T2-NEXT: adds r2, r0, #4
; T2-NEXT: mov.w r12, #1
; T2-NEXT: b .LBB0_3
; T2-NEXT: .LBB0_1: @ %tailrecurse.switch
; T2-NEXT: @ in Loop: Header=BB0_3 Depth=1
; T2-NEXT: cmp r3, #1
; T2-NEXT: it ne
; T2-NEXT: bxne lr
; T2-NEXT: .LBB0_2: @ %sw.bb
; T2-NEXT: @ in Loop: Header=BB0_3 Depth=1
; T2-NEXT: orr.w r1, r3, r1, lsl #1
; T2-NEXT: adds r2, #4
; T2-NEXT: add.w r12, r12, #1
; T2-NEXT: .LBB0_3: @ %tailrecurse
; T2-NEXT: @ =>This Inner Loop Header: Depth=1
; T2-NEXT: ldr r3, [r2, #-4]
; T2-NEXT: ands r3, r3, #3
; T2-NEXT: beq .LBB0_2
; T2-NEXT: @ %bb.4: @ %tailrecurse.switch
; T2-NEXT: @ in Loop: Header=BB0_3 Depth=1
; T2-NEXT: cmp r3, #3
; T2-NEXT: itt eq
; T2-NEXT: moveq r0, r2
; T2-NEXT: bxeq lr
; T2-NEXT: .LBB0_5: @ %tailrecurse.switch
; T2-NEXT: @ in Loop: Header=BB0_3 Depth=1
; T2-NEXT: cmp r3, #2
; T2-NEXT: bne .LBB0_1
; T2-NEXT: @ %bb.6: @ %sw.bb8
; T2-NEXT: add r1, r12
; T2-NEXT: add.w r0, r0, r1, lsl #2
; T2-NEXT: bx lr
;
; V8-LABEL: foo:
; V8: @ %bb.0: @ %entry
; V8-NEXT: adds r2, r0, #4
; V8-NEXT: mov.w r12, #1
; V8-NEXT: b .LBB0_3
; V8-NEXT: .LBB0_1: @ %tailrecurse.switch
; V8-NEXT: @ in Loop: Header=BB0_3 Depth=1
; V8-NEXT: cmp r3, #1
; V8-NEXT: it ne
; V8-NEXT: bxne lr
; V8-NEXT: .LBB0_2: @ %sw.bb
; V8-NEXT: @ in Loop: Header=BB0_3 Depth=1
; V8-NEXT: orr.w r1, r3, r1, lsl #1
; V8-NEXT: adds r2, #4
; V8-NEXT: add.w r12, r12, #1
; V8-NEXT: .LBB0_3: @ %tailrecurse
; V8-NEXT: @ =>This Inner Loop Header: Depth=1
; V8-NEXT: ldr r3, [r2, #-4]
; V8-NEXT: ands r3, r3, #3
; V8-NEXT: beq .LBB0_2
; V8-NEXT: @ %bb.4: @ %tailrecurse.switch
; V8-NEXT: @ in Loop: Header=BB0_3 Depth=1
; V8-NEXT: cmp r3, #3
; V8-NEXT: itt eq
; V8-NEXT: moveq r0, r2
; V8-NEXT: bxeq lr
; V8-NEXT: .LBB0_5: @ %tailrecurse.switch
; V8-NEXT: @ in Loop: Header=BB0_3 Depth=1
; V8-NEXT: cmp r3, #2
; V8-NEXT: bne .LBB0_1
; V8-NEXT: @ %bb.6: @ %sw.bb8
; V8-NEXT: add r1, r12
; V8-NEXT: add.w r0, r0, r1, lsl #2
; V8-NEXT: bx lr
entry:
%scevgep = getelementptr %struct.Foo, ptr %this, i32 1
br label %tailrecurse
tailrecurse: ; preds = %sw.bb, %entry
%lsr.iv2 = phi ptr [ %scevgep3, %sw.bb ], [ %scevgep, %entry ]
%lsr.iv = phi i32 [ %lsr.iv.next, %sw.bb ], [ 1, %entry ]
%acc.tr = phi i32 [ %or, %sw.bb ], [ %acc, %entry ]
%scevgep5 = getelementptr ptr, ptr %lsr.iv2, i32 -1
%tmp2 = load ptr, ptr %scevgep5
%0 = ptrtoint ptr %tmp2 to i32
%and = and i32 %0, 3
%tst = icmp eq i32 %and, 0
br i1 %tst, label %sw.bb, label %tailrecurse.switch
tailrecurse.switch: ; preds = %tailrecurse
switch i32 %and, label %sw.epilog [
i32 1, label %sw.bb
i32 3, label %sw.bb6
i32 2, label %sw.bb8
], !prof !1
sw.bb: ; preds = %tailrecurse.switch, %tailrecurse
%shl = shl i32 %acc.tr, 1
%or = or i32 %and, %shl
%lsr.iv.next = add i32 %lsr.iv, 1
%scevgep3 = getelementptr %struct.Foo, ptr %lsr.iv2, i32 1
br label %tailrecurse
sw.bb6: ; preds = %tailrecurse.switch
ret ptr %lsr.iv2
sw.bb8: ; preds = %tailrecurse.switch
%tmp1 = add i32 %acc.tr, %lsr.iv
%add.ptr11 = getelementptr inbounds %struct.Foo, ptr %this, i32 %tmp1
ret ptr %add.ptr11
sw.epilog: ; preds = %tailrecurse.switch
ret ptr undef
}
; Another test that exercises the AND/TST peephole optimization and also
; generates a predicated ANDS instruction. Check that the predicate is printed
; after the "S" modifier on the instruction.
%struct.S = type { ptr, [1 x i8] }
define internal zeroext i8 @bar(ptr %x, ptr nocapture %y) nounwind readonly {
; ARM-LABEL: bar:
; ARM: @ %bb.0: @ %entry
; ARM-NEXT: ldrb r2, [r0, #4]
; ARM-NEXT: ands r2, r2, #112
; ARM-NEXT: ldrbne r1, [r1, #4]
; ARM-NEXT: andsne r1, r1, #112
; ARM-NEXT: beq .LBB1_2
; ARM-NEXT: @ %bb.1: @ %bb2
; ARM-NEXT: cmp r2, #16
; ARM-NEXT: cmpne r1, #16
; ARM-NEXT: andeq r0, r0, #255
; ARM-NEXT: moveq pc, lr
; ARM-NEXT: .LBB1_2: @ %return
; ARM-NEXT: mov r0, #1
; ARM-NEXT: mov pc, lr
;
; THUMB-LABEL: bar:
; THUMB: @ %bb.0: @ %entry
; THUMB-NEXT: ldrb r2, [r0, #4]
; THUMB-NEXT: movs r3, #112
; THUMB-NEXT: ands r2, r3
; THUMB-NEXT: beq .LBB1_4
; THUMB-NEXT: @ %bb.1: @ %bb
; THUMB-NEXT: ldrb r1, [r1, #4]
; THUMB-NEXT: ands r1, r3
; THUMB-NEXT: beq .LBB1_4
; THUMB-NEXT: @ %bb.2: @ %bb2
; THUMB-NEXT: cmp r2, #16
; THUMB-NEXT: beq .LBB1_5
; THUMB-NEXT: @ %bb.3: @ %bb2
; THUMB-NEXT: cmp r1, #16
; THUMB-NEXT: beq .LBB1_5
; THUMB-NEXT: .LBB1_4: @ %return
; THUMB-NEXT: movs r0, #1
; THUMB-NEXT: bx lr
; THUMB-NEXT: .LBB1_5: @ %bb4
; THUMB-NEXT: movs r1, #255
; THUMB-NEXT: ands r0, r1
; THUMB-NEXT: bx lr
;
; T2-LABEL: bar:
; T2: @ %bb.0: @ %entry
; T2-NEXT: ldrb r2, [r0, #4]
; T2-NEXT: ands r2, r2, #112
; T2-NEXT: itt ne
; T2-NEXT: ldrbne r1, [r1, #4]
; T2-NEXT: andsne r1, r1, #112
; T2-NEXT: beq .LBB1_2
; T2-NEXT: @ %bb.1: @ %bb2
; T2-NEXT: cmp r2, #16
; T2-NEXT: itee ne
; T2-NEXT: cmpne r1, #16
; T2-NEXT: uxtbeq r0, r0
; T2-NEXT: bxeq lr
; T2-NEXT: .LBB1_2: @ %return
; T2-NEXT: movs r0, #1
; T2-NEXT: bx lr
;
; V8-LABEL: bar:
; V8: @ %bb.0: @ %entry
; V8-NEXT: ldrb r2, [r0, #4]
; V8-NEXT: ands r2, r2, #112
; V8-NEXT: itt ne
; V8-NEXT: ldrbne r1, [r1, #4]
; V8-NEXT: andsne r1, r1, #112
; V8-NEXT: beq .LBB1_2
; V8-NEXT: @ %bb.1: @ %bb2
; V8-NEXT: cmp r2, #16
; V8-NEXT: itee ne
; V8-NEXT: cmpne r1, #16
; V8-NEXT: uxtbeq r0, r0
; V8-NEXT: bxeq lr
; V8-NEXT: .LBB1_2: @ %return
; V8-NEXT: movs r0, #1
; V8-NEXT: bx lr
entry:
%0 = getelementptr inbounds %struct.S, ptr %x, i32 0, i32 1, i32 0
%1 = load i8, ptr %0, align 1
%2 = zext i8 %1 to i32
%3 = and i32 %2, 112
%4 = icmp eq i32 %3, 0
br i1 %4, label %return, label %bb
bb: ; preds = %entry
%5 = getelementptr inbounds %struct.S, ptr %y, i32 0, i32 1, i32 0
%6 = load i8, ptr %5, align 1
%7 = zext i8 %6 to i32
%8 = and i32 %7, 112
%9 = icmp eq i32 %8, 0
br i1 %9, label %return, label %bb2
bb2: ; preds = %bb
%10 = icmp eq i32 %3, 16
%11 = icmp eq i32 %8, 16
%or.cond = or i1 %10, %11
br i1 %or.cond, label %bb4, label %return
bb4: ; preds = %bb2
%12 = ptrtoint ptr %x to i32
%phitmp = trunc i32 %12 to i8
ret i8 %phitmp
return: ; preds = %bb2, %bb, %entry
ret i8 1
}
; We were looking through multiple COPY instructions to find an AND we might
; fold into a TST, but in doing so we changed the register being tested allowing
; folding of unrelated tests (in this case, a TST against r1 was eliminated in
; favour of an AND of r0).
define i32 @test_tst_assessment(i32 %a, i32 %b) {
; ARM-LABEL: test_tst_assessment:
; ARM: @ %bb.0:
; ARM-NEXT: and r0, r0, #1
; ARM-NEXT: tst r1, #1
; ARM-NEXT: subne r0, r0, #1
; ARM-NEXT: mov pc, lr
;
; THUMB-LABEL: test_tst_assessment:
; THUMB: @ %bb.0:
; THUMB-NEXT: movs r2, r0
; THUMB-NEXT: movs r0, #1
; THUMB-NEXT: ands r0, r2
; THUMB-NEXT: lsls r1, r1, #31
; THUMB-NEXT: beq .LBB2_2
; THUMB-NEXT: @ %bb.1:
; THUMB-NEXT: subs r0, r0, #1
; THUMB-NEXT: .LBB2_2:
; THUMB-NEXT: bx lr
;
; T2-LABEL: test_tst_assessment:
; T2: @ %bb.0:
; T2-NEXT: and r0, r0, #1
; T2-NEXT: lsls r1, r1, #31
; T2-NEXT: it ne
; T2-NEXT: subne r0, #1
; T2-NEXT: bx lr
;
; V8-LABEL: test_tst_assessment:
; V8: @ %bb.0:
; V8-NEXT: and r0, r0, #1
; V8-NEXT: lsls r1, r1, #31
; V8-NEXT: it ne
; V8-NEXT: subne r0, #1
; V8-NEXT: bx lr
%and1 = and i32 %a, 1
%sub = sub i32 %and1, 1
%and2 = and i32 %b, 1
%cmp = icmp eq i32 %and2, 0
%sel = select i1 %cmp, i32 %and1, i32 %sub
ret i32 %sel
}
!1 = !{!"branch_weights", i32 1, i32 1, i32 3, i32 2 }
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