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@39895 91177308-0d34-0410-b5e6-96231b3b80d8
75 lines
1.4 KiB
LLVM
75 lines
1.4 KiB
LLVM
; This test makes sure that mul instructions are properly eliminated.
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;
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; RUN: llvm-upgrade < %s | llvm-as | opt -instcombine | llvm-dis | not grep mul
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; END.
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implementation
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int %test1(int %A) {
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%B = mul int %A, 1
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ret int %B
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}
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int %test2(int %A) {
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%B = mul int %A, 2 ; Should convert to an add instruction
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ret int %B
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}
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int %test3(int %A) {
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%B = mul int %A, 0 ; This should disappear entirely
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ret int %B
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}
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double %test4(double %A) {
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%B = mul double 1.0, %A ; This is safe for FP
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ret double %B
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}
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int %test5(int %A) {
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%B = mul int %A, 8
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ret int %B
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}
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ubyte %test6(ubyte %A) {
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%B = mul ubyte %A, 8
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%C = mul ubyte %B, 8
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ret ubyte %C
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}
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int %test7(int %i) {
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%tmp = mul int %i, -1 ; %tmp = sub 0, %i
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ret int %tmp
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}
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ulong %test8(ulong %i) {
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%j = mul ulong %i, 18446744073709551615 ; tmp = sub 0, %i
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ret ulong %j
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}
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uint %test9(uint %i) {
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%j = mul uint %i, 4294967295 ; %j = sub 0, %i
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ret uint %j
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}
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uint %test10(int %a, uint %b) {
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%c = setlt int %a, 0
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%d = cast bool %c to uint
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%e = mul uint %d, %b ; e = b & (a >> 31)
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ret uint %e
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}
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uint %test11(int %a, uint %b) {
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%c = setle int %a, -1
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%d = cast bool %c to uint
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%e = mul uint %d, %b ; e = b & (a >> 31)
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ret uint %e
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}
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uint %test12(ubyte %a, uint %b) {
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%c = setgt ubyte %a, 127
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%d = cast bool %c to uint
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%e = mul uint %d, %b ; e = b & (a >> 31)
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ret uint %e
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}
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