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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6966 91177308-0d34-0410-b5e6-96231b3b80d8
48 lines
821 B
LLVM
48 lines
821 B
LLVM
; This test makes sure that mul instructions are properly eliminated.
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;
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; RUN: as < %s | opt -instcombine | dis | not grep mul
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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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