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| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -indvars -dce -disable-lftr -S | FileCheck %s
; LFTR should not eliminate the need for the computation of i*i completely
; due to LFTR is disabled.
; Provide legal integer types.
target datalayout = "n8:16:32:64"
@A = external global i32
define i32 @quadratic_setlt() {
; CHECK-LABEL: @quadratic_setlt(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[I:%.*]] = phi i32 [ 7, [[ENTRY:%.*]] ], [ [[I_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT: [[I_NEXT]] = add nuw nsw i32 [[I]], 1
; CHECK-NEXT: store i32 [[I]], i32* @A
; CHECK-NEXT: [[I2:%.*]] = mul i32 [[I]], [[I]]
; CHECK-NEXT: [[C:%.*]] = icmp slt i32 [[I2]], 1000
; CHECK-NEXT: br i1 [[C]], label [[LOOP]], label [[LOOPEXIT:%.*]]
; CHECK: loopexit:
; CHECK-NEXT: ret i32 32
;
entry:
br label %loop
loop:
%i = phi i32 [ 7, %entry ], [ %i.next, %loop ]
%i.next = add i32 %i, 1
store i32 %i, i32* @A
%i2 = mul i32 %i, %i
%c = icmp slt i32 %i2, 1000
br i1 %c, label %loop, label %loopexit
loopexit:
ret i32 %i
}
|