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; RUN: opt -passes=metarenamer -S < %s | FileCheck %s
define void @opcodes(ptr %p, ptr %arr) {
; CHECK-LABEL: bb:
; CHECK: %load = load i32, ptr %arg, align 4
; CHECK: br label %bb2
; CHECK-LABEL: bb2: ; preds = %bb5, %bb
; CHECK: %phi = phi i32 [ %load, %bb ], [ %sub, %bb5 ]
; CHECK: %icmp = icmp eq i32 %phi, 0
; CHECK: br i1 %icmp, label %bb8, label %bb3
; CHECK-LABEL: bb3: ; preds = %bb2
; CHECK: %sub = sub i32 %phi, 1
; CHECK: %icmp4 = icmp ult i32 %sub, %load
; CHECK: br i1 %icmp4, label %bb5, label %bb9
; CHECK-LABEL: bb5: ; preds = %bb3
; CHECK: %getelementptr = getelementptr i32, ptr %arg, i32 %phi
; CHECK: %load6 = load i32, ptr %getelementptr, align 4
; CHECK: %icmp7 = icmp eq i32 %load6, 0
; CHECK: br i1 %icmp7, label %bb2, label %bb8
preheader:
%len = load i32, ptr %p
br label %loop
loop:
%iv = phi i32 [%len, %preheader], [%iv.next, %backedge]
%zero_cond = icmp eq i32 %iv, 0
br i1 %zero_cond, label %exit, label %range_check_block
range_check_block:
%iv.next = sub i32 %iv, 1
%range_check = icmp ult i32 %iv.next, %len
br i1 %range_check, label %backedge, label %fail
backedge:
%el.ptr = getelementptr i32, ptr %p, i32 %iv
%el = load i32, ptr %el.ptr
%loop.cond = icmp eq i32 %el, 0
br i1 %loop.cond, label %loop, label %exit
exit:
ret void
fail:
unreachable
}
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