llvm-6502/test/Transforms/InstCombine/shift-sra.ll
2008-03-01 09:15:35 +00:00

20 lines
704 B
LLVM

; RUN: llvm-as < %s | opt -instcombine | llvm-dis | \
; RUN: grep {lshr i32} | count 2
; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep ashr
define i32 @test1(i32 %X, i8 %A) {
%shift.upgrd.1 = zext i8 %A to i32 ; <i32> [#uses=1]
; can be logical shift.
%Y = ashr i32 %X, %shift.upgrd.1 ; <i32> [#uses=1]
%Z = and i32 %Y, 1 ; <i32> [#uses=1]
ret i32 %Z
}
define i32 @test2(i8 %tmp) {
%tmp3 = zext i8 %tmp to i32 ; <i32> [#uses=1]
%tmp4 = add i32 %tmp3, 7 ; <i32> [#uses=1]
%tmp5 = ashr i32 %tmp4, 3 ; <i32> [#uses=1]
ret i32 %tmp5
}