From f61873cc671bcf88d105583bfb13825091a18218 Mon Sep 17 00:00:00 2001 From: Dan Gohman Date: Fri, 9 Apr 2010 19:14:31 +0000 Subject: When emitting code for an add, don't force a SCEVUnknown wrapper around a hoisted intermediate result if the intermediate result isn't an Instruction. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100884 91177308-0d34-0410-b5e6-96231b3b80d8 --- test/Transforms/LoopStrengthReduce/uglygep.ll | 37 +++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 test/Transforms/LoopStrengthReduce/uglygep.ll (limited to 'test/Transforms') diff --git a/test/Transforms/LoopStrengthReduce/uglygep.ll b/test/Transforms/LoopStrengthReduce/uglygep.ll new file mode 100644 index 0000000..e72364f --- /dev/null +++ b/test/Transforms/LoopStrengthReduce/uglygep.ll @@ -0,0 +1,37 @@ +; RUN: opt < %s -loop-reduce -S | not grep uglygep + +; LSR shouldn't consider %t8 to be an interesting user of %t6, and it +; should be able to form pretty GEPs. + +target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64" +target triple = "x86_64-unknown-linux-gnu" + +define void @Z4() nounwind { +bb: + br label %bb3 + +bb1: ; preds = %bb3 + br i1 undef, label %bb10, label %bb2 + +bb2: ; preds = %bb1 + %t = add i64 %t4, 1 ; [#uses=1] + br label %bb3 + +bb3: ; preds = %bb2, %bb + %t4 = phi i64 [ %t, %bb2 ], [ 0, %bb ] ; [#uses=3] + br label %bb1 + +bb10: ; preds = %bb9 + %t7 = icmp eq i64 %t4, 0 ; [#uses=1] + %t3 = add i64 %t4, 16 ; [#uses=1] + br label %bb14 + +bb14: ; preds = %bb14, %bb10 + %t2 = getelementptr inbounds i8* undef, i64 %t4 ; [#uses=1] + store i8 undef, i8* %t2 + %t6 = load float** undef + %t8 = bitcast float* %t6 to i8* ; [#uses=1] + %t9 = getelementptr inbounds i8* %t8, i64 %t3 ; [#uses=1] + store i8 undef, i8* %t9 + br label %bb14 +} -- cgit v1.1