forked from OSchip/llvm-project
30 lines
1.1 KiB
LLVM
30 lines
1.1 KiB
LLVM
; Tests to make sure elimination of casts is working correctly
|
|
; RUN: llvm-as < %s | opt -instcombine | llvm-dis | notcast
|
|
|
|
define i16 @test1(i16 %a) {
|
|
%tmp = zext i16 %a to i32 ; <i32> [#uses=2]
|
|
%tmp21 = lshr i32 %tmp, 8 ; <i32> [#uses=1]
|
|
%tmp5 = shl i32 %tmp, 8 ; <i32> [#uses=1]
|
|
%tmp.upgrd.32 = or i32 %tmp21, %tmp5 ; <i32> [#uses=1]
|
|
%tmp.upgrd.3 = trunc i32 %tmp.upgrd.32 to i16 ; <i16> [#uses=1]
|
|
ret i16 %tmp.upgrd.3
|
|
}
|
|
|
|
define i16 @test2(i16 %a) {
|
|
%tmp = zext i16 %a to i32 ; <i32> [#uses=2]
|
|
%tmp21 = lshr i32 %tmp, 9 ; <i32> [#uses=1]
|
|
%tmp5 = shl i32 %tmp, 8 ; <i32> [#uses=1]
|
|
%tmp.upgrd.32 = or i32 %tmp21, %tmp5 ; <i32> [#uses=1]
|
|
%tmp.upgrd.3 = trunc i32 %tmp.upgrd.32 to i16 ; <i16> [#uses=1]
|
|
ret i16 %tmp.upgrd.3
|
|
}
|
|
|
|
; PR1263
|
|
define i32* @test3(i32* %tmp1) {
|
|
%tmp64 = bitcast i32* %tmp1 to { i32 }* ; <{ i32 }*> [#uses=1]
|
|
%tmp65 = getelementptr { i32 }* %tmp64, i32 0, i32 0 ; <i32*> [#uses=1]
|
|
ret i32* %tmp65
|
|
}
|
|
|
|
|