lvi-for-ashr.ll
1.63 KB
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=attributor -attributor-disable=false -S < %s | FileCheck %s
define i32 @test-ashr(i32 %c) {
; CHECK-LABEL: define {{[^@]+}}@test-ashr
; CHECK-SAME: (i32 [[C:%.*]])
; CHECK-NEXT: chk65:
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[C:%.*]], 65
; CHECK-NEXT: br i1 [[CMP]], label [[RETURN:%.*]], label [[CHK0:%.*]]
; CHECK: chk0:
; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 [[C]], 0
; CHECK-NEXT: br i1 [[CMP]], label [[RETURN]], label [[BB_IF:%.*]]
; CHECK: bb_if:
; CHECK-NEXT: [[ASHR_VAL:%.*]] = ashr exact i32 [[C]], 2
; CHECK-NEXT: [[CMP2:%.*]] = icmp sgt i32 [[ASHR_VAL]], 15
; CHECK-NEXT: br i1 [[CMP2]], label [[BB_THEN:%.*]], label [[RETURN]]
; CHECK: bb_then:
; CHECK-NEXT: [[CMP3:%.*]] = icmp eq i32 [[ASHR_VAL]], 16
; CHECK-NEXT: [[DOT:%.*]] = select i1 [[CMP3]], i32 3, i32 2
; CHECK-NEXT: br label [[RETURN]]
; CHECK: return:
; CHECK-NEXT: [[RETVAL:%.*]] = phi i32 [ 0, [[CHK65:%.*]] ], [ 1, [[CHK0]] ], [ [[DOT]], [[BB_THEN]] ], [ 4, [[BB_IF]] ]
; CHECK-NEXT: ret i32 [[RETVAL]]
;
; FIXME: DOT should be replaced with 3
chk65:
%cmp = icmp sgt i32 %c, 65
br i1 %cmp, label %return, label %chk0
chk0:
%cmp1 = icmp slt i32 %c, 0
br i1 %cmp, label %return, label %bb_if
bb_if:
%ashr.val = ashr exact i32 %c, 2
%cmp2 = icmp sgt i32 %ashr.val, 15
br i1 %cmp2, label %bb_then, label %return
bb_then:
%cmp3 = icmp eq i32 %ashr.val, 16
%. = select i1 %cmp3, i32 3, i32 2
br label %return
return:
%retval = phi i32 [0, %chk65], [1, %chk0], [%., %bb_then], [4, %bb_if]
ret i32 %retval
}