From dbae4db67a01a007646b0f9da5db408cc846906c Mon Sep 17 00:00:00 2001 From: Dan Gohman Date: Tue, 11 Aug 2009 20:47:47 +0000 Subject: Optimize exact sdiv by a constant power of 2 to ashr. llvm-svn: 78714 --- llvm/test/Transforms/InstCombine/exact-sdiv.ll | 15 +++++++++++++++ 1 file changed, 15 insertions(+) create mode 100644 llvm/test/Transforms/InstCombine/exact-sdiv.ll (limited to 'llvm/test/Transforms/InstCombine/exact-sdiv.ll') diff --git a/llvm/test/Transforms/InstCombine/exact-sdiv.ll b/llvm/test/Transforms/InstCombine/exact-sdiv.ll new file mode 100644 index 00000000000..9ed524f8ec7 --- /dev/null +++ b/llvm/test/Transforms/InstCombine/exact-sdiv.ll @@ -0,0 +1,15 @@ +; RUN: llvm-as < %s | opt -instcombine | llvm-dis | FileCheck %s + +; CHECK: define i32 @foo +; CHECK: sdiv i32 %x, 8 +define i32 @foo(i32 %x) { + %y = sdiv i32 %x, 8 + ret i32 %y +} + +; CHECK: define i32 @bar +; CHECK: ashr i32 %x, 3 +define i32 @bar(i32 %x) { + %y = sdiv exact i32 %x, 8 + ret i32 %y +} -- cgit v1.2.3