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Add a regtest for cases we now recognize as rotates, thanks to Scott Michel's 

recent dagcombine patch

llvm-svn: 35606
This commit is contained in:
Chris Lattner 2007-04-02 22:08:54 +00:00
parent 16627a542f
commit d9eb0d9f5a
1 changed files with 38 additions and 0 deletions
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38
llvm/test/CodeGen/PowerPC/rotl-2.ll Normal file
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@ -0,0 +1,38 @@
; RUN: llvm-as < %s | llc -march=ppc32 | grep rlwinm | wc -l | grep 4 &&
; RUN: llvm-as < %s | llc -march=ppc32 | grep rlwnm | wc -l | grep 2 &&
; RUN: llvm-as < %s | llc -march=ppc32 | not grep or
define i32 @rotl32(i32 %A, i8 %Amt) {
%shift.upgrd.1 = zext i8 %Amt to i32 ; <i32> [#uses=1]
%B = shl i32 %A, %shift.upgrd.1 ; <i32> [#uses=1]
%Amt2 = sub i8 32, %Amt ; <i8> [#uses=1]
%shift.upgrd.2 = zext i8 %Amt2 to i32 ; <i32> [#uses=1]
%C = lshr i32 %A, %shift.upgrd.2 ; <i32> [#uses=1]
%D = or i32 %B, %C ; <i32> [#uses=1]
ret i32 %D
}
define i32 @rotr32(i32 %A, i8 %Amt) {
%shift.upgrd.3 = zext i8 %Amt to i32 ; <i32> [#uses=1]
%B = lshr i32 %A, %shift.upgrd.3 ; <i32> [#uses=1]
%Amt2 = sub i8 32, %Amt ; <i8> [#uses=1]
%shift.upgrd.4 = zext i8 %Amt2 to i32 ; <i32> [#uses=1]
%C = shl i32 %A, %shift.upgrd.4 ; <i32> [#uses=1]
%D = or i32 %B, %C ; <i32> [#uses=1]
ret i32 %D
}
define i32 @rotli32(i32 %A) {
%B = shl i32 %A, 5 ; <i32> [#uses=1]
%C = lshr i32 %A, 27 ; <i32> [#uses=1]
%D = or i32 %B, %C ; <i32> [#uses=1]
ret i32 %D
}
define i32 @rotri32(i32 %A) {
%B = lshr i32 %A, 5 ; <i32> [#uses=1]
%C = shl i32 %A, 27 ; <i32> [#uses=1]
%D = or i32 %B, %C ; <i32> [#uses=1]
ret i32 %D
}