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c14380d195
Math functions are mark as readonly because they read the floating point rounding mode. Because we don't vectorize loops that would contain function calls that set the rounding mode it is safe to ignore this memory read. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185299 91177308-0d34-0410-b5e6-96231b3b80d8
33 lines
1.2 KiB
LLVM
33 lines
1.2 KiB
LLVM
; RUN: opt -S -loop-vectorize -force-vector-width=2 -force-vector-unroll=1 < %s | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
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; Make sure we can vectorize loops with functions to math library functions.
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; They might read the rounding mode but we are only vectorizing loops that
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; contain a limited set of function calls and none of them sets the rounding
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; mode, so vectorizing them is safe.
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; CHECK: test
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; CHECK: <2 x double>
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define void @test(double* %d, double %t) {
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entry:
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br label %for.body
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for.body:
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%arrayidx = getelementptr inbounds double* %d, i64 %indvars.iv
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%0 = load double* %arrayidx, align 8
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%1 = tail call double @llvm.pow.f64(double %0, double %t)
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store double %1, double* %arrayidx, align 8
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%indvars.iv.next = add i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp ne i32 %lftr.wideiv, 128
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br i1 %exitcond, label %for.body, label %for.end
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for.end:
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ret void
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}
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declare double @llvm.pow.f64(double, double)
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