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Chris prefers icmp/select over udiv!

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60187 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky
2008-11-27 22:41:10 +00:00
parent df563ca1f3
commit 8ca5248522
3 changed files with 19 additions and 10 deletions
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9
test/Transforms/InstCombine/udiv-simplify-bug-1.ll
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@@ -1,16 +1,11 @@
; RUN: llvm-as < %s | opt -instcombine | llvm-dis > %t1.ll
; RUN: grep udiv %t1.ll | count 3
; RUN: grep zext %t1.ll | count 3
; RUN: grep udiv %t1.ll | count 2
; RUN: grep zext %t1.ll | count 2
; PR2274
; The udiv instructions shouldn't be optimized away, and the
; sext instructions should be optimized to zext.
define i64 @foo(i32 %x) nounwind {
%r = udiv i32 %x, -1
%z = sext i32 %r to i64
ret i64 %z
}
define i64 @bar(i32 %x) nounwind {
%y = lshr i32 %x, 30
%r = udiv i32 %y, 3