llvm-6502/test/CodeGen/X86/commute-cmov.ll
Dan Gohman e5af2d3a22 Make x86's BT instruction matching more thorough, and add some
dagcombines that help it match in several more cases. Add
several more cases to test/CodeGen/X86/bt.ll. This doesn't
yet include matching for BT with an immediate operand, it
just covers more register+register cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63266 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-29 01:59:02 +00:00

26 lines
775 B
LLVM

; RUN: llvm-as < %s | llc -march=x86 > %t
; RUN: grep btl %t | count 2
; RUN: grep cmov %t | count 2
; RUN: not grep test %t
; RUN: not grep set %t
; RUN: not grep j %t
; RUN: not grep cmovne %t
; RUN: not grep cmove %t
define i32 @foo(i32 %x, i32 %n, i32 %w, i32 %v) nounwind readnone {
entry:
%0 = lshr i32 %x, %n ; <i32> [#uses=1]
%1 = and i32 %0, 1 ; <i32> [#uses=1]
%toBool = icmp eq i32 %1, 0 ; <i1> [#uses=1]
%.0 = select i1 %toBool, i32 %v, i32 12 ; <i32> [#uses=1]
ret i32 %.0
}
define i32 @bar(i32 %x, i32 %n, i32 %w, i32 %v) nounwind readnone {
entry:
%0 = lshr i32 %x, %n ; <i32> [#uses=1]
%1 = and i32 %0, 1 ; <i32> [#uses=1]
%toBool = icmp eq i32 %1, 0 ; <i1> [#uses=1]
%.0 = select i1 %toBool, i32 12, i32 %v ; <i32> [#uses=1]
ret i32 %.0
}