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https://github.com/c64scene-ar/llvm-6502.git
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3da59db637
The long awaited CAST patch. This introduces 12 new instructions into LLVM to replace the cast instruction. Corresponding changes throughout LLVM are provided. This passes llvm-test, llvm/test, and SPEC CPUINT2000 with the exception of 175.vpr which fails only on a slight floating point output difference. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31931 91177308-0d34-0410-b5e6-96231b3b80d8
18 lines
618 B
LLVM
18 lines
618 B
LLVM
; This file contains various testcases that check to see that instcombine
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; is narrowing computations when possible.
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; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep 'ret bool false'
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; test1 - Eliminating the casts in this testcase (by narrowing the AND
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; operation) allows instcombine to realize the function always returns false.
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;
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bool %test1(int %A, int %B) {
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%C1 = setlt int %A, %B
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%ELIM1 = zext bool %C1 to uint
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%C2 = setgt int %A, %B
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%ELIM2 = zext bool %C2 to uint
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%C3 = and uint %ELIM1, %ELIM2
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%ELIM3 = trunc uint %C3 to bool
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ret bool %ELIM3
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}
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