mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-09-01 19:29:22 +00:00
The small utility function that pattern matches Base + Index + Offset patterns for loads and stores fails to recognize the base pointer for loads/stores from/into an array at offset 0 inside a loop. As a result DAGCombiner::MergeConsecutiveStores was not able to merge all stores. This commit fixes the issue by adding an additional pattern match and also a test case. Reviewer: Nadav git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188936 91177308-0d34-0410-b5e6-96231b3b80d8
31 lines
956 B
LLVM
31 lines
956 B
LLVM
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mcpu=x86-64 | FileCheck %s
|
|
|
|
define void @merge_store(i32* nocapture %a) {
|
|
; CHECK-LABEL: merge_store:
|
|
; CHECK: movq
|
|
; CHECK: movq
|
|
entry:
|
|
br label %for.body
|
|
|
|
for.body:
|
|
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
|
|
%arrayidx = getelementptr inbounds i32* %a, i64 %indvars.iv
|
|
store i32 1, i32* %arrayidx, align 4
|
|
%0 = or i64 %indvars.iv, 1
|
|
%arrayidx2 = getelementptr inbounds i32* %a, i64 %0
|
|
store i32 1, i32* %arrayidx2, align 4
|
|
%1 = or i64 %indvars.iv, 2
|
|
%arrayidx5 = getelementptr inbounds i32* %a, i64 %1
|
|
store i32 1, i32* %arrayidx5, align 4
|
|
%2 = or i64 %indvars.iv, 3
|
|
%arrayidx8 = getelementptr inbounds i32* %a, i64 %2
|
|
store i32 1, i32* %arrayidx8, align 4
|
|
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 4
|
|
%3 = trunc i64 %indvars.iv.next to i32
|
|
%cmp = icmp slt i32 %3, 1000
|
|
br i1 %cmp, label %for.body, label %for.end
|
|
|
|
for.end:
|
|
ret void
|
|
}
|