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https://github.com/c64scene-ar/llvm-6502.git
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832254e1c2
This feature is needed in order to support shifts of more than 255 bits on large integer types. This changes the syntax for llvm assembly to make shl, ashr and lshr instructions look like a binary operator: shl i32 %X, 1 instead of shl i32 %X, i8 1 Additionally, this should help a few passes perform additional optimizations. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33776 91177308-0d34-0410-b5e6-96231b3b80d8
23 lines
589 B
LLVM
23 lines
589 B
LLVM
; RUN: llvm-as < %s | llc -march=arm &&
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; RUN: llvm-as < %s | llc -march=arm -mattr=+v6 &&
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; RUN: llvm-as < %s | llc -march=arm -mattr=+v6 | grep "sxtb" | wc -l | grep 1 &&
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; RUN: llvm-as < %s | llc -march=arm -mattr=+v6 | grep "sxtab" | wc -l | grep 1
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define i8 @test1(i32 %A) sext {
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%B = lshr i32 %A, 8
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%C = shl i32 %A, 24
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%D = or i32 %B, %C
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%E = trunc i32 %D to i8
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ret i8 %E
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}
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define i32 @test2(i32 %A, i32 %X) sext {
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%B = lshr i32 %A, 8
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%C = shl i32 %A, 24
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%D = or i32 %B, %C
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%E = trunc i32 %D to i8
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%F = sext i8 %E to i32
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%G = add i32 %F, %X
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ret i32 %G
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}
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