diff options
Diffstat (limited to 'llvm/test/Transforms/LoopVectorize/write-only.ll')
| -rw-r--r-- | llvm/test/Transforms/LoopVectorize/write-only.ll | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/llvm/test/Transforms/LoopVectorize/write-only.ll b/llvm/test/Transforms/LoopVectorize/write-only.ll index ae3eb2046f6..01b7414cf49 100644 --- a/llvm/test/Transforms/LoopVectorize/write-only.ll +++ b/llvm/test/Transforms/LoopVectorize/write-only.ll @@ -23,3 +23,26 @@ define i32 @read_mod_write_single_ptr(float* nocapture %a, i32 %n) nounwind uwta ._crit_edge: ; preds = %.lr.ph, %0 ret i32 undef } + +; Ensure that volatile stores are not vectorized. +; CHECK-LABEL: @read_mod_write_single_ptr_volatile_store( +; CHECK-NOT: store <4 x float> +; CHECK: ret i32 +define i32 @read_mod_write_single_ptr_volatile_store(float* nocapture %a, i32 %n) nounwind uwtable ssp { + %1 = icmp sgt i32 %n, 0 + br i1 %1, label %.lr.ph, label %._crit_edge + +.lr.ph: ; preds = %0, %.lr.ph + %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %0 ] + %2 = getelementptr inbounds float, float* %a, i64 %indvars.iv + %3 = load float, float* %2, align 4 + %4 = fmul float %3, 3.000000e+00 + store volatile float %4, float* %2, align 4 + %indvars.iv.next = add i64 %indvars.iv, 1 + %lftr.wideiv = trunc i64 %indvars.iv.next to i32 + %exitcond = icmp eq i32 %lftr.wideiv, %n + br i1 %exitcond, label %._crit_edge, label %.lr.ph + +._crit_edge: ; preds = %.lr.ph, %0 + ret i32 undef +} |
