mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-24 06:30:19 +00:00
6ca2d8b7c7
In unreachable blocks it's legal to have instructions like "%x = op %x". Such instuctions are not schedulable. Therefore the SLPVectorizer has to check for unreachable blocks and ignore them. Fixes bug 20646. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216256 91177308-0d34-0410-b5e6-96231b3b80d8
41 lines
1.4 KiB
LLVM
41 lines
1.4 KiB
LLVM
; RUN: opt < %s -basicaa -slp-vectorizer -S -mtriple=x86_64-apple-macosx10.8.0 -mcpu=corei7
|
|
|
|
; Check if the SLPVectorizer does not crash when handling
|
|
; unreachable blocks with unscheduleable instructions.
|
|
|
|
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
|
|
target triple = "x86_64-apple-macosx10.9.0"
|
|
|
|
define void @foo(i32* nocapture %x) #0 {
|
|
entry:
|
|
br label %bb2
|
|
|
|
bb1: ; an unreachable block
|
|
%t3 = getelementptr inbounds i32* %x, i64 4
|
|
%t4 = load i32* %t3, align 4
|
|
%t5 = getelementptr inbounds i32* %x, i64 5
|
|
%t6 = load i32* %t5, align 4
|
|
%bad = fadd float %bad, 0.000000e+00 ; <- an instruction with self dependency,
|
|
; but legal in unreachable code
|
|
%t7 = getelementptr inbounds i32* %x, i64 6
|
|
%t8 = load i32* %t7, align 4
|
|
%t9 = getelementptr inbounds i32* %x, i64 7
|
|
%t10 = load i32* %t9, align 4
|
|
br label %bb2
|
|
|
|
bb2:
|
|
%t1.0 = phi i32 [ %t4, %bb1 ], [ 2, %entry ]
|
|
%t2.0 = phi i32 [ %t6, %bb1 ], [ 2, %entry ]
|
|
%t3.0 = phi i32 [ %t8, %bb1 ], [ 2, %entry ]
|
|
%t4.0 = phi i32 [ %t10, %bb1 ], [ 2, %entry ]
|
|
store i32 %t1.0, i32* %x, align 4
|
|
%t12 = getelementptr inbounds i32* %x, i64 1
|
|
store i32 %t2.0, i32* %t12, align 4
|
|
%t13 = getelementptr inbounds i32* %x, i64 2
|
|
store i32 %t3.0, i32* %t13, align 4
|
|
%t14 = getelementptr inbounds i32* %x, i64 3
|
|
store i32 %t4.0, i32* %t14, align 4
|
|
ret void
|
|
}
|
|
|