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https://github.com/c64scene-ar/llvm-6502.git
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ae3a0be92e
integer and floating-point opcodes, introducing FAdd, FSub, and FMul. For now, the AsmParser, BitcodeReader, and IRBuilder all preserve backwards compatability, and the Core LLVM APIs preserve backwards compatibility for IR producers. Most front-ends won't need to change immediately. This implements the first step of the plan outlined here: http://nondot.org/sabre/LLVMNotes/IntegerOverflow.txt git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72897 91177308-0d34-0410-b5e6-96231b3b80d8
25 lines
1.2 KiB
LLVM
25 lines
1.2 KiB
LLVM
; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep {add double .sx, .sy}
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; The 'or' has multiple uses, make sure that this doesn't prevent instcombine
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; from propagating the extends to the truncs.
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define double @ScaleObjectAdd(double %sx, double %sy, double %sz) nounwind {
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entry:
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%sx34 = bitcast double %sx to i64 ; <i64> [#uses=1]
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%sx3435 = zext i64 %sx34 to i192 ; <i192> [#uses=1]
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%sy22 = bitcast double %sy to i64 ; <i64> [#uses=1]
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%sy2223 = zext i64 %sy22 to i192 ; <i192> [#uses=1]
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%sy222324 = shl i192 %sy2223, 128 ; <i192> [#uses=1]
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%sy222324.ins = or i192 %sx3435, %sy222324 ; <i192> [#uses=1]
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%a = trunc i192 %sy222324.ins to i64 ; <i64> [#uses=1]
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%b = bitcast i64 %a to double ; <double> [#uses=1]
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%c = lshr i192 %sy222324.ins, 128 ; <i192> [#uses=1]
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%d = trunc i192 %c to i64 ; <i64> [#uses=1]
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%e = bitcast i64 %d to double ; <double> [#uses=1]
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%f = fadd double %b, %e
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; ret double %e
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ret double %f
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}
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