45 lines
729 B
LLVM
45 lines
729 B
LLVM
; This test makes sure that these instructions are properly eliminated.
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;
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; RUN: if as < %s | opt -instcombine | dis | grep sh
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; RUN: then exit 1
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; RUN: else exit 0
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; RUN: fi
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implementation
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int "test1"(int %A) {
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%B = shl int %A, ubyte 0
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ret int %B
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}
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int "test2"(ubyte %A) {
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%B = shl int 0, ubyte %A
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ret int %B
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}
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int "test3"(int %A) {
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%B = shr int %A, ubyte 0
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ret int %B
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}
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int "test4"(ubyte %A) {
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%B = shr int 0, ubyte %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 = shr uint %A, ubyte 32 ;; shift all bits out
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ret uint %B
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}
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uint %test6(uint %A) {
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%B = shl uint %A, ubyte 1 ;; convert to an add instruction
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ret uint %B
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}
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int %test7(ubyte %A) {
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%B = shr int -1, ubyte %A ;; Always equal to -1
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ret int %B
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}
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