mirror of
https://github.com/c64scene-ar/llvm-6502.git
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26002 91177308-0d34-0410-b5e6-96231b3b80d8
70 lines
1.2 KiB
LLVM
70 lines
1.2 KiB
LLVM
; This test makes sure that div instructions are properly eliminated.
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;
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; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep div
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implementation
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int %test1(int %A) {
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%B = div int %A, 1
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ret int %B
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}
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uint %test2(uint %A) {
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%B = div uint %A, 8 ; => Shift
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ret uint %B
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}
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int %test3(int %A) {
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%B = div int 0, %A ; => 0, don't need to keep traps
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ret int %B
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}
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int %test4(int %A) {
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%B = div int %A, -1 ; 0-A
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ret int %B
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}
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uint %test5(uint %A) {
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%B = div uint %A, 4294967280
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%C = div uint %B, 4294967292
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ret uint %C
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}
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bool %test6(uint %A) {
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%B = div uint %A, 123
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%C = seteq uint %B, 0 ; A < 123
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ret bool %C
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}
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bool %test7(uint %A) {
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%B = div uint %A, 10
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%C = seteq uint %B, 2 ; A >= 20 && A < 30
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ret bool %C
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}
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bool %test8(ubyte %A) {
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%B = div ubyte %A, 123
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%C = seteq ubyte %B, 2 ; A >= 246
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ret bool %C
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}
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bool %test9(ubyte %A) {
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%B = div ubyte %A, 123
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%C = setne ubyte %B, 2 ; A < 246
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ret bool %C
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}
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uint %test10(uint %X, bool %C) {
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%V = select bool %C, uint 64, uint 8
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%R = div uint %X, %V
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ret uint %R
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}
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uint %test10(uint %X, ubyte %B) {
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%Amt = shl uint 32, ubyte %B
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%V = div uint %X, %Amt
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ret uint %V
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}
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