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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
33 lines
944 B
LLVM
33 lines
944 B
LLVM
; An integer truncation to bool should be done with an and instruction to make
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; sure only the LSBit survives. Test that this is the case both for a returned
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; value and as the operand of a branch.
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; RUN: llvm-as < %s | llc -march=x86 &&
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; RUN: llvm-as < %s | llc -march=x86 | grep '\(and\)\|\(test.*1\)' | wc -l | grep 3
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bool %test1(int %X) {
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%Y = trunc int %X to bool
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ret bool %Y
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}
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bool %test2(int %val, int %mask) {
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entry:
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%mask = trunc int %mask to ubyte
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%shifted = ashr int %val, ubyte %mask
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%anded = and int %shifted, 1
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%trunced = trunc int %anded to bool
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br bool %trunced, label %ret_true, label %ret_false
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ret_true:
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ret bool true
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ret_false:
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ret bool false
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}
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int %test3(sbyte* %ptr) {
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%val = load sbyte* %ptr
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%tmp = trunc sbyte %val to bool ; %<bool> [#uses=1]
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br bool %tmp, label %cond_true, label %cond_false
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cond_true:
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ret int 21
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cond_false:
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ret int 42
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}
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