From d9bd22b2c48e0f7b8916447c74167b44556fc7c3 Mon Sep 17 00:00:00 2001 From: Matthias Braun Date: Fri, 10 Jul 2015 18:37:33 +0000 Subject: ARMLoadStoreOpt: Merge subs/adds into LDRD/STRD; Factor out common code This commit factors out common code from MergeBaseUpdateLoadStore() and MergeBaseUpdateLSMultiple() and introduces a new function MergeBaseUpdateLSDouble() which merges adds/subs preceding/following a strd/ldrd instruction into an strd/ldrd instruction with writeback where possible. Differential Revision: http://reviews.llvm.org/D10676 llvm-svn: 241928 --- llvm/test/CodeGen/ARM/ldrd.ll | 56 +++++++++++++++++++++++++++++++++++++++---- 1 file changed, 52 insertions(+), 4 deletions(-) (limited to 'llvm/test/CodeGen/ARM/ldrd.ll') diff --git a/llvm/test/CodeGen/ARM/ldrd.ll b/llvm/test/CodeGen/ARM/ldrd.ll index 5411618ed86..56cdcaedf90 100644 --- a/llvm/test/CodeGen/ARM/ldrd.ll +++ b/llvm/test/CodeGen/ARM/ldrd.ll @@ -112,10 +112,10 @@ entry: } ; CHECK-LABEL: strd_spill_ldrd_reload: -; A8: strd r1, r0, [sp] -; M3: strd r1, r0, [sp] -; BASIC: strd r1, r0, [sp] -; GREEDY: strd r0, r1, [sp] +; A8: strd r1, r0, [sp, #-8]! +; M3: strd r1, r0, [sp, #-8]! +; BASIC: strd r1, r0, [sp, #-8]! +; GREEDY: strd r0, r1, [sp, #-8]! ; CHECK: @ InlineAsm Start ; CHECK: @ InlineAsm End ; A8: ldrd r2, r1, [sp] @@ -131,5 +131,53 @@ define void @strd_spill_ldrd_reload(i32 %v0, i32 %v1) { ret void } +declare void @extfunc2(i32*, i32, i32) + +; CHECK-LABEL: ldrd_postupdate_dec: +; CHECK: ldrd r1, r2, [r0], #-8 +; CHECK-NEXT: bl{{x?}} _extfunc +define void @ldrd_postupdate_dec(i32* %p0) { + %p0.1 = getelementptr i32, i32* %p0, i32 1 + %v0 = load i32, i32* %p0 + %v1 = load i32, i32* %p0.1 + %p1 = getelementptr i32, i32* %p0, i32 -2 + call void @extfunc2(i32* %p1, i32 %v0, i32 %v1) + ret void +} + +; CHECK-LABEL: ldrd_postupdate_inc: +; CHECK: ldrd r1, r2, [r0], #8 +; CHECK-NEXT: bl{{x?}} _extfunc +define void @ldrd_postupdate_inc(i32* %p0) { + %p0.1 = getelementptr i32, i32* %p0, i32 1 + %v0 = load i32, i32* %p0 + %v1 = load i32, i32* %p0.1 + %p1 = getelementptr i32, i32* %p0, i32 2 + call void @extfunc2(i32* %p1, i32 %v0, i32 %v1) + ret void +} + +; CHECK-LABEL: strd_postupdate_dec: +; CHECK: strd r1, r2, [r0], #-8 +; CHECK-NEXT: bx lr +define i32* @strd_postupdate_dec(i32* %p0, i32 %v0, i32 %v1) { + %p0.1 = getelementptr i32, i32* %p0, i32 1 + store i32 %v0, i32* %p0 + store i32 %v1, i32* %p0.1 + %p1 = getelementptr i32, i32* %p0, i32 -2 + ret i32* %p1 +} + +; CHECK-LABEL: strd_postupdate_inc: +; CHECK: strd r1, r2, [r0], #8 +; CHECK-NEXT: bx lr +define i32* @strd_postupdate_inc(i32* %p0, i32 %v0, i32 %v1) { + %p0.1 = getelementptr i32, i32* %p0, i32 1 + store i32 %v0, i32* %p0 + store i32 %v1, i32* %p0.1 + %p1 = getelementptr i32, i32* %p0, i32 2 + ret i32* %p1 +} + declare void @llvm.lifetime.start(i64, i8* nocapture) nounwind declare void @llvm.lifetime.end(i64, i8* nocapture) nounwind -- cgit v1.2.3