llvm-6502/test/Transforms/InstCombine/2004-11-27-SetCCForCastLargerAndConstant.ll
2006-12-02 04:23:10 +00:00

135 lines
3.1 KiB
LLVM

; This test case tests the InstructionCombining optimization that
; reduces things like:
; %Y = cast sbyte %X to uint
; %C = setlt uint %Y, 1024
; to
; %C = bool true
; It includes test cases for different constant values, signedness of the
; cast operands, and types of setCC operators. In all cases, the cast should
; be eliminated. In many cases the setCC is also eliminated based on the
; constant value and the range of the casted value.
;
; RUN: llvm-upgrade %s -o - | llvm-as | opt -instcombine | llvm-dis | notcast '.*int'
implementation ; Functions:
bool %lt_signed_to_large_unsigned(sbyte %SB) {
%Y = cast sbyte %SB to uint ; <uint> [#uses=1]
%C = setlt uint %Y, 1024 ; <bool> [#uses=1]
ret bool %C
}
bool %lt_signed_to_large_signed(sbyte %SB) {
%Y = cast sbyte %SB to int
%C = setlt int %Y, 1024
ret bool %C
}
bool %lt_signed_to_large_negative(sbyte %SB) {
%Y = cast sbyte %SB to int
%C = setlt int %Y, -1024
ret bool %C
}
bool %lt_signed_to_small_signed(sbyte %SB) {
%Y = cast sbyte %SB to int
%C = setlt int %Y, 17
ret bool %C
}
bool %lt_signed_to_small_negative(sbyte %SB) {
%Y = cast sbyte %SB to int
%C = setlt int %Y, -17
ret bool %C
}
bool %lt_unsigned_to_large_unsigned(ubyte %SB) {
%Y = cast ubyte %SB to uint ; <uint> [#uses=1]
%C = setlt uint %Y, 1024 ; <bool> [#uses=1]
ret bool %C
}
bool %lt_unsigned_to_large_signed(ubyte %SB) {
%Y = cast ubyte %SB to int
%C = setlt int %Y, 1024
ret bool %C
}
bool %lt_unsigned_to_large_negative(ubyte %SB) {
%Y = cast ubyte %SB to int
%C = setlt int %Y, -1024
ret bool %C
}
bool %lt_unsigned_to_small_unsigned(ubyte %SB) {
%Y = cast ubyte %SB to uint ; <uint> [#uses=1]
%C = setlt uint %Y, 17 ; <bool> [#uses=1]
ret bool %C
}
bool %lt_unsigned_to_small_negative(ubyte %SB) {
%Y = cast ubyte %SB to int
%C = setlt int %Y, -17
ret bool %C
}
bool %gt_signed_to_large_unsigned(sbyte %SB) {
%Y = cast sbyte %SB to uint ; <uint> [#uses=1]
%C = setgt uint %Y, 1024 ; <bool> [#uses=1]
ret bool %C
}
bool %gt_signed_to_large_signed(sbyte %SB) {
%Y = cast sbyte %SB to int
%C = setgt int %Y, 1024
ret bool %C
}
bool %gt_signed_to_large_negative(sbyte %SB) {
%Y = cast sbyte %SB to int
%C = setgt int %Y, -1024
ret bool %C
}
bool %gt_signed_to_small_signed(sbyte %SB) {
%Y = cast sbyte %SB to int
%C = setgt int %Y, 17
ret bool %C
}
bool %gt_signed_to_small_negative(sbyte %SB) {
%Y = cast sbyte %SB to int
%C = setgt int %Y, -17
ret bool %C
}
bool %gt_unsigned_to_large_unsigned(ubyte %SB) {
%Y = cast ubyte %SB to uint ; <uint> [#uses=1]
%C = setgt uint %Y, 1024 ; <bool> [#uses=1]
ret bool %C
}
bool %gt_unsigned_to_large_signed(ubyte %SB) {
%Y = cast ubyte %SB to int
%C = setgt int %Y, 1024
ret bool %C
}
bool %gt_unsigned_to_large_negative(ubyte %SB) {
%Y = cast ubyte %SB to int
%C = setgt int %Y, -1024
ret bool %C
}
bool %gt_unsigned_to_small_unsigned(ubyte %SB) {
%Y = cast ubyte %SB to uint ; <uint> [#uses=1]
%C = setgt uint %Y, 17 ; <bool> [#uses=1]
ret bool %C
}
bool %gt_unsigned_to_small_negative(ubyte %SB) {
%Y = cast ubyte %SB to int
%C = setgt int %Y, -17
ret bool %C
}