From c65c747bc4ee7d3ca8463d33708bbb2aed38a809 Mon Sep 17 00:00:00 2001 From: Duncan Sands Date: Fri, 28 Oct 2011 18:17:44 +0000 Subject: Fold icmp ugt (udiv X, Y), X to false. Spotted by my super-optimizer in 186.crafty. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143209 91177308-0d34-0410-b5e6-96231b3b80d8 --- test/Transforms/InstSimplify/compare.ll | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) (limited to 'test/Transforms') diff --git a/test/Transforms/InstSimplify/compare.ll b/test/Transforms/InstSimplify/compare.ll index 3ece118902..57727c9ab7 100644 --- a/test/Transforms/InstSimplify/compare.ll +++ b/test/Transforms/InstSimplify/compare.ll @@ -300,6 +300,30 @@ define i1 @udiv2(i32 %X, i32 %Y, i32 %Z) { ; CHECK: ret i1 true } +define i1 @udiv3(i32 %X, i32 %Y) { +; CHECK: @udiv3 + %A = udiv i32 %X, %Y + %C = icmp ugt i32 %A, %X + ret i1 %C +; CHECK: ret i1 false +} + +define i1 @udiv4(i32 %X, i32 %Y) { +; CHECK: @udiv4 + %A = udiv i32 %X, %Y + %C = icmp ule i32 %A, %X + ret i1 %C +; CHECK: ret i1 true +} + +define i1 @udiv5(i32 %X) { +; CHECK: @udiv5 + %A = udiv i32 123, %X + %C = icmp ugt i32 %A, 124 + ret i1 %C +; CHECK: ret i1 false +} + define i1 @sdiv1(i32 %X) { ; CHECK: @sdiv1 %A = sdiv i32 %X, 1000000 -- cgit v1.2.3-70-g09d2