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0ba06da958
D75801 removed the last and only user of this option, so we can drop it now. The original idea behind this was to only run expensive transforms under -O3, but apart from the one known bits transform, this has never really taken off. I believe nowadays the recommendation is to put expensive transforms in AggressiveInstCombine instead, though that isn't terribly popular either :) Differential Revision: https://reviews.llvm.org/D76540
26 lines
768 B
LLVM
26 lines
768 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -instcombine -instcombine-infinite-loop-threshold=2 < %s | FileCheck %s
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; This test used to cause an infinite combine loop.
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define i16 @passthru(i16 returned %x) {
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; CHECK-LABEL: @passthru(
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; CHECK-NEXT: ret i16 [[X:%.*]]
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;
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ret i16 %x
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}
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define i16 @test(i16 %arg) {
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; CHECK-LABEL: @test(
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; CHECK-NEXT: [[ZERO:%.*]] = call i16 @passthru(i16 0)
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; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i16 [[ARG:%.*]], 0
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; CHECK-NEXT: [[RET:%.*]] = select i1 [[TMP1]], i16 [[ARG]], i16 0
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; CHECK-NEXT: ret i16 [[RET]]
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;
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%zero = call i16 @passthru(i16 0)
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%sub = sub nuw nsw i16 %arg, %zero
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%cmp = icmp slt i16 %sub, 0
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%ret = select i1 %cmp, i16 0, i16 %sub
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ret i16 %ret
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}
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