| Eric Christopher | cee313d | 2019-04-17 04:52:47 +0000 | [diff] [blame] | 1 | ; RUN: opt -S -loop-vectorize -force-vector-width=4 -force-vector-interleave=1 < %s | FileCheck %s |
| 2 | target datalayout = "e-p:32:32:32-S128-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f16:16:16-f32:32:32-f64:32:64-f128:128:128-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32" |
| 3 | |
| 4 | |
| 5 | ; We can vectorize this code because if the address computation would wrap then |
| 6 | ; a load from 0 would take place which is undefined behaviour in address space 0 |
| 7 | ; according to LLVM IR semantics. |
| 8 | |
| 9 | ; PR16592 |
| 10 | |
| 11 | ; CHECK-LABEL: @safe( |
| 12 | ; CHECK: <4 x float> |
| 13 | |
| 14 | define void @safe(float* %A, float* %B, float %K) { |
| 15 | entry: |
| 16 | br label %"<bb 3>" |
| 17 | |
| 18 | "<bb 3>": |
| 19 | %i_15 = phi i32 [ 0, %entry ], [ %i_19, %"<bb 3>" ] |
| 20 | %pp3 = getelementptr float, float* %A, i32 %i_15 |
| 21 | %D.1396_10 = load float, float* %pp3, align 4 |
| 22 | %pp24 = getelementptr float, float* %B, i32 %i_15 |
| 23 | %D.1398_15 = load float, float* %pp24, align 4 |
| 24 | %D.1399_17 = fadd float %D.1398_15, %K |
| 25 | %D.1400_18 = fmul float %D.1396_10, %D.1399_17 |
| 26 | store float %D.1400_18, float* %pp3, align 4 |
| 27 | %i_19 = add nsw i32 %i_15, 1 |
| 28 | %exitcond = icmp ne i32 %i_19, 64 |
| 29 | br i1 %exitcond, label %"<bb 3>", label %return |
| 30 | |
| 31 | return: |
| 32 | ret void |
| 33 | } |
| 34 | |
| 35 | ; In a non-default address space we don't have this rule. |
| 36 | |
| 37 | ; CHECK-LABEL: @notsafe( |
| 38 | ; CHECK-NOT: <4 x float> |
| 39 | |
| 40 | define void @notsafe(float addrspace(5) * %A, float* %B, float %K) { |
| 41 | entry: |
| 42 | br label %"<bb 3>" |
| 43 | |
| 44 | "<bb 3>": |
| 45 | %i_15 = phi i32 [ 0, %entry ], [ %i_19, %"<bb 3>" ] |
| 46 | %pp3 = getelementptr float, float addrspace(5) * %A, i32 %i_15 |
| 47 | %D.1396_10 = load float, float addrspace(5) * %pp3, align 4 |
| 48 | %pp24 = getelementptr float, float* %B, i32 %i_15 |
| 49 | %D.1398_15 = load float, float* %pp24, align 4 |
| 50 | %D.1399_17 = fadd float %D.1398_15, %K |
| 51 | %D.1400_18 = fmul float %D.1396_10, %D.1399_17 |
| 52 | store float %D.1400_18, float addrspace(5) * %pp3, align 4 |
| 53 | %i_19 = add nsw i32 %i_15, 1 |
| 54 | %exitcond = icmp ne i32 %i_19, 64 |
| 55 | br i1 %exitcond, label %"<bb 3>", label %return |
| 56 | |
| 57 | return: |
| 58 | ret void |
| 59 | } |
| 60 | |
| 61 | |