Imported Upstream version 5.18.0.167

Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a

external/llvm/test/Transforms/LoopVectorize/pr31098.ll

@@ -1,100 +0,0 @@
-; REQUIRES: asserts
-; RUN: opt -S -loop-vectorize -force-vector-width=4 -force-vector-interleave=1 -enable-interleaved-mem-accesses=true -debug-only=loop-accesses < %s  2>&1 | FileCheck %s
-
-target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
-
-; Check that the compile-time-unknown depenendece-distance is resolved 
-; statically. Due to the non-unit stride of the accesses in this testcase
-; we are currently not able to create runtime dependence checks, and therefore
-; if we don't resolve the dependence statically we cannot vectorize the loop.
-;
-; Specifically in this example, during dependence analysis we get 6 unknown 
-; dependence distances between the 8 real/imaginary accesses below: 
-;    dist = 8*D, 4+8*D, -4+8*D, -8*D, 4-8*D, -4-8*D.
-; At compile time we can prove for all of the above that |dist|>loopBound*step
-; (where the step is 8bytes, and the loopBound is D-1), and thereby conclude 
-; that there are no dependencies (without runtime tests):
-; |8*D|>8*D-8, |4+8*D|>8*D-8, |-4+8*D|>8*D-8, etc.
-
-; #include <stdlib.h>
-; class Complex {
-; private:
-;   float real_;
-;   float imaginary_;
-;
-; public:
-;   Complex() : real_(0), imaginary_(0) { }
-;   Complex(float real, float imaginary) : real_(real), imaginary_(imaginary) { }
-;   Complex(const Complex &rhs) : real_(rhs.real()), imaginary_(rhs.imaginary()) { }
-; 
-;   inline float real() const { return real_; }
-;   inline float imaginary() const { return imaginary_; }
-; 
-;   Complex operator+(const Complex& rhs) const
-;   {
-;    return Complex(real_ + rhs.real_, imaginary_ + rhs.imaginary_);
-;   }
-;
-;   Complex operator-(const Complex& rhs) const
-;  {
-;     return Complex(real_ - rhs.real_, imaginary_ - rhs.imaginary_);
-;   }
-; };
-;
-; void Test(Complex *out, size_t size)
-; {
-;     size_t D = size / 2;
-;     for (size_t offset = 0; offset < D; ++offset)
-;     {
-;         Complex t0 = out[offset];
-;         Complex t1 = out[offset + D];
-;         out[offset] = t1 + t0;
-;         out[offset + D] = t0 - t1;
-;     }
-; }
-
-; CHECK-LABEL: Test
-; CHECK: LAA: No unsafe dependent memory operations in loop.  We don't need runtime memory checks.
-; CHECK: vector.body:
-; CHECK: <4 x i32>
-
-%class.Complex = type { float, float }
-
-define void @Test(%class.Complex* nocapture %out, i64 %size) local_unnamed_addr {
-entry:
-  %div = lshr i64 %size, 1
-  %cmp47 = icmp eq i64 %div, 0
-  br i1 %cmp47, label %for.cond.cleanup, label %for.body.preheader
-
-for.body.preheader:
-  br label %for.body
-
-for.cond.cleanup.loopexit:
-  br label %for.cond.cleanup
-
-for.cond.cleanup:
-  ret void
-
-for.body:
-  %offset.048 = phi i64 [ %inc, %for.body ], [ 0, %for.body.preheader ]
-  %0 = getelementptr inbounds %class.Complex, %class.Complex* %out, i64 %offset.048, i32 0
-  %1 = load float, float* %0, align 4
-  %imaginary_.i.i = getelementptr inbounds %class.Complex, %class.Complex* %out, i64 %offset.048, i32 1
-  %2 = load float, float* %imaginary_.i.i, align 4
-  %add = add nuw i64 %offset.048, %div
-  %3 = getelementptr inbounds %class.Complex, %class.Complex* %out, i64 %add, i32 0
-  %4 = load float, float* %3, align 4
-  %imaginary_.i.i28 = getelementptr inbounds %class.Complex, %class.Complex* %out, i64 %add, i32 1
-  %5 = load float, float* %imaginary_.i.i28, align 4
-  %add.i = fadd fast float %4, %1
-  %add4.i = fadd fast float %5, %2
-  store float %add.i, float* %0, align 4
-  store float %add4.i, float* %imaginary_.i.i, align 4
-  %sub.i = fsub fast float %1, %4
-  %sub4.i = fsub fast float %2, %5
-  store float %sub.i, float* %3, align 4
-  store float %sub4.i, float* %imaginary_.i.i28, align 4
-  %inc = add nuw nsw i64 %offset.048, 1
-  %exitcond = icmp eq i64 %inc, %div
-  br i1 %exitcond, label %for.cond.cleanup.loopexit, label %for.body
-}