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| author | Eli Friedman <eli.friedman@gmail.com> | 2008-11-30 06:02:26 +0000 |
|---|---|---|
| committer | Eli Friedman <eli.friedman@gmail.com> | 2008-11-30 06:02:26 +0000 |
| commit | 201c9776bd4197569b71fef0519f98a28d1db989 (patch) | |
| tree | f23152f3c338d59a79a7407bf5a96c8eb366d2da /test/CodeGen/X86 | |
| parent | 3f93df5733dce50961303d571cf16e032b0809bf (diff) | |
| download | llvm-201c9776bd4197569b71fef0519f98a28d1db989.tar.gz llvm-201c9776bd4197569b71fef0519f98a28d1db989.tar.bz2 llvm-201c9776bd4197569b71fef0519f98a28d1db989.tar.xz | |
Fix for PR2164: allow transforming arbitrary-width unsigned divides into
multiplies.
Some more cleverness would be nice, though. It would be nice if we
could do this transformation on illegal types. Also, we would
prefer a narrower constant when possible so that we can use a narrower
multiply, which can be cheaper.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60283 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86')
| -rw-r--r-- | test/CodeGen/X86/2008-11-29-DivideConstant16bit.ll | 10 | ||||
| -rw-r--r-- | test/CodeGen/X86/urem-i8-constant.ll | 2 |
2 files changed, 11 insertions, 1 deletions
diff --git a/test/CodeGen/X86/2008-11-29-DivideConstant16bit.ll b/test/CodeGen/X86/2008-11-29-DivideConstant16bit.ll new file mode 100644 index 0000000000..fe1870e1d8 --- /dev/null +++ b/test/CodeGen/X86/2008-11-29-DivideConstant16bit.ll @@ -0,0 +1,10 @@ +; RUN: llvm-as < %s | llc -mtriple=i686-pc-linux-gnu | grep 63551 | count 1 +; ModuleID = '<stdin>' +target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32" +target triple = "i686-pc-linux-gnu" + +define zeroext i16 @a(i16 zeroext %x) nounwind { +entry: + %div = udiv i16 %x, 33 ; <i32> [#uses=1] + ret i16 %div +} diff --git a/test/CodeGen/X86/urem-i8-constant.ll b/test/CodeGen/X86/urem-i8-constant.ll index 8a433334f6..bc93684877 100644 --- a/test/CodeGen/X86/urem-i8-constant.ll +++ b/test/CodeGen/X86/urem-i8-constant.ll @@ -1,4 +1,4 @@ -; RUN: llvm-as < %s | llc -march=x86 | not grep mul +; RUN: llvm-as < %s | llc -march=x86 | grep 111 define i8 @foo(i8 %tmp325) { %t546 = urem i8 %tmp325, 37 |