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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=thumbv8.1m.main %s -o - | FileCheck %s
define void @cbz_exit(ptr %in, ptr %res) {
; CHECK-LABEL: cbz_exit:
; CHECK: @ %bb.0: @ %entry
; CHECK-NEXT: subs r2, r0, #4
; CHECK-NEXT: mov.w r0, #-1
; CHECK-NEXT: .LBB0_1: @ %loop
; CHECK-NEXT: @ =>This Inner Loop Header: Depth=1
; CHECK-NEXT: ldr r3, [r2, #4]!
; CHECK-NEXT: adds r0, #1
; CHECK-NEXT: cbz r3, .LBB0_2
; CHECK-NEXT: le .LBB0_1
; CHECK-NEXT: .LBB0_2: @ %exit
; CHECK-NEXT: str r0, [r1]
; CHECK-NEXT: bx lr
entry:
br label %loop
loop:
%offset = phi i32 [ 0, %entry ], [ %next, %loop ]
%ptr = getelementptr i32, ptr %in, i32 %offset
%val = load i32, ptr %ptr
%next = add i32 %offset, 1
%cmp = icmp eq i32 %val, 0
br i1 %cmp, label %exit, label %loop
exit:
store i32 %offset, ptr %res
ret void
}
define void @cbnz_exit(ptr %in, ptr %res) {
; CHECK-LABEL: cbnz_exit:
; CHECK: @ %bb.0: @ %entry
; CHECK-NEXT: subs r2, r0, #4
; CHECK-NEXT: mov.w r0, #-1
; CHECK-NEXT: .LBB1_1: @ %loop
; CHECK-NEXT: @ =>This Inner Loop Header: Depth=1
; CHECK-NEXT: ldr r3, [r2, #4]!
; CHECK-NEXT: adds r0, #1
; CHECK-NEXT: cbnz r3, .LBB1_2
; CHECK-NEXT: le .LBB1_1
; CHECK-NEXT: .LBB1_2: @ %exit
; CHECK-NEXT: str r0, [r1]
; CHECK-NEXT: bx lr
entry:
br label %loop
loop:
%offset = phi i32 [ 0, %entry ], [ %next, %loop ]
%ptr = getelementptr i32, ptr %in, i32 %offset
%val = load i32, ptr %ptr
%next = add i32 %offset, 1
%cmp = icmp ne i32 %val, 0
br i1 %cmp, label %exit, label %loop
exit:
store i32 %offset, ptr %res
ret void
}
define void @cbnz_exit_too_large(ptr %in, ptr %res) {
; CHECK-LABEL: cbnz_exit_too_large:
; CHECK: @ %bb.0: @ %entry
; CHECK-NEXT: subs r2, r0, #4
; CHECK-NEXT: mov.w r0, #-1
; CHECK-NEXT: .LBB2_1: @ %loop
; CHECK-NEXT: @ =>This Inner Loop Header: Depth=1
; CHECK-NEXT: ldr r12, [r2, #4]!
; CHECK-NEXT: .zero 4090
; CHECK-NEXT: adds r0, #1
; CHECK-NEXT: cmp.w r12, #0
; CHECK-NEXT: beq.w .LBB2_1
; CHECK-NEXT: @ %bb.2: @ %exit
; CHECK-NEXT: str r0, [r1]
; CHECK-NEXT: bx lr
entry:
br label %loop
loop:
%offset = phi i32 [ 0, %entry ], [ %next, %loop ]
%ptr = getelementptr i32, ptr %in, i32 %offset
%val = load i32, ptr %ptr
%next = add i32 %offset, 1
%cmp = icmp ne i32 %val, 0
%size = call i32 @llvm.arm.space(i32 4090, i32 undef)
br i1 %cmp, label %exit, label %loop
exit:
store i32 %offset, ptr %res
ret void
}
define void @cbz_exit_minsize(ptr %in, ptr %res) #0 {
; CHECK-LABEL: cbz_exit_minsize:
; CHECK: @ %bb.0: @ %entry
; CHECK-NEXT: movs r2, #0
; CHECK-NEXT: .LBB3_1: @ %loop
; CHECK-NEXT: @ =>This Inner Loop Header: Depth=1
; CHECK-NEXT: ldr.w r3, [r0, r2, lsl #2]
; CHECK-NEXT: adds r2, #1
; CHECK-NEXT: cmp r3, #0
; CHECK-NEXT: bne .LBB3_1
; CHECK-NEXT: @ %bb.2: @ %exit
; CHECK-NEXT: subs r0, r2, #1
; CHECK-NEXT: str r0, [r1]
; CHECK-NEXT: bx lr
entry:
br label %loop
loop:
%offset = phi i32 [ 0, %entry ], [ %next, %loop ]
%ptr = getelementptr i32, ptr %in, i32 %offset
%val = load i32, ptr %ptr
%next = add i32 %offset, 1
%cmp = icmp eq i32 %val, 0
br i1 %cmp, label %exit, label %loop
exit:
store i32 %offset, ptr %res
ret void
}
define void @cbnz_exit_minsize(ptr %in, ptr %res) #0 {
; CHECK-LABEL: cbnz_exit_minsize:
; CHECK: @ %bb.0: @ %entry
; CHECK-NEXT: movs r2, #0
; CHECK-NEXT: .LBB4_1: @ %loop
; CHECK-NEXT: @ =>This Inner Loop Header: Depth=1
; CHECK-NEXT: ldr.w r3, [r0, r2, lsl #2]
; CHECK-NEXT: adds r2, #1
; CHECK-NEXT: cmp r3, #0
; CHECK-NEXT: beq .LBB4_1
; CHECK-NEXT: @ %bb.2: @ %exit
; CHECK-NEXT: subs r0, r2, #1
; CHECK-NEXT: str r0, [r1]
; CHECK-NEXT: bx lr
entry:
br label %loop
loop:
%offset = phi i32 [ 0, %entry ], [ %next, %loop ]
%ptr = getelementptr i32, ptr %in, i32 %offset
%val = load i32, ptr %ptr
%next = add i32 %offset, 1
%cmp = icmp ne i32 %val, 0
br i1 %cmp, label %exit, label %loop
exit:
store i32 %offset, ptr %res
ret void
}
attributes #0 = { minsize optsize }
declare i32 @llvm.arm.space(i32 immarg, i32);
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