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