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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
893 B
LLVM
25 lines
893 B
LLVM
; RUN: llvm-as < %s | opt -analyze -scalar-evolution -disable-output \
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; RUN: | grep {sext.*trunc.*Exits: 11}
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; ScalarEvolution should be able to compute a loop exit value for %indvar.i8.
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define void @another_count_down_signed(double* %d, i64 %n) nounwind {
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entry:
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br label %loop
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loop: ; preds = %loop, %entry
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%indvar = phi i64 [ %n, %entry ], [ %indvar.next, %loop ] ; <i64> [#uses=4]
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%s0 = shl i64 %indvar, 8 ; <i64> [#uses=1]
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%indvar.i8 = ashr i64 %s0, 8 ; <i64> [#uses=1]
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%t0 = getelementptr double* %d, i64 %indvar.i8 ; <double*> [#uses=2]
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%t1 = load double* %t0 ; <double> [#uses=1]
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%t2 = fmul double %t1, 1.000000e-01 ; <double> [#uses=1]
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store double %t2, double* %t0
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%indvar.next = sub i64 %indvar, 1 ; <i64> [#uses=2]
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%exitcond = icmp eq i64 %indvar.next, 10 ; <i1> [#uses=1]
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br i1 %exitcond, label %return, label %loop
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return: ; preds = %loop
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ret void
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}
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