From 2c8362b2a220b5854bdcfab13c8f6d87b9c78cb0 Mon Sep 17 00:00:00 2001 From: Sergey Kachkov Date: Fri, 3 Feb 2023 13:19:59 +0300 Subject: [PATCH] [NFC] Add pre-commit test for simplifyCastInst in PHITransAddr --- llvm/test/Transforms/GVN/PRE/phi-translate-2.ll | 37 +++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/llvm/test/Transforms/GVN/PRE/phi-translate-2.ll b/llvm/test/Transforms/GVN/PRE/phi-translate-2.ll index 92dc991..d968716 100644 --- a/llvm/test/Transforms/GVN/PRE/phi-translate-2.ll +++ b/llvm/test/Transforms/GVN/PRE/phi-translate-2.ll @@ -300,3 +300,40 @@ if.end: while.end: ret void } + +; Load from arrayidx2 is partially redundant, check that address translation can +; fold sext + trunc across phi node together. +define i32 @test7(ptr noalias %ptr1, ptr noalias %ptr2, i32 %i, i1 %cond) { +; CHECK-LABEL: @test7( +; CHECK-NEXT: entry: +; CHECK-NEXT: br i1 [[COND:%.*]], label [[IF_THEN:%.*]], label [[IF_END:%.*]] +; CHECK: if.then: +; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[PTR1:%.*]], i32 [[I:%.*]] +; CHECK-NEXT: [[TMP:%.*]] = load i32, ptr [[ARRAYIDX]], align 4 +; CHECK-NEXT: store i32 [[TMP]], ptr [[PTR2:%.*]], align 4 +; CHECK-NEXT: [[IDX_EXT:%.*]] = sext i32 [[I]] to i64 +; CHECK-NEXT: br label [[IF_END]] +; CHECK: if.end: +; CHECK-NEXT: [[IDX:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IDX_EXT]], [[IF_THEN]] ] +; CHECK-NEXT: [[IDX_TRUNC:%.*]] = trunc i64 [[IDX]] to i32 +; CHECK-NEXT: [[ARRAYIDX2:%.*]] = getelementptr inbounds i32, ptr [[PTR1]], i32 [[IDX_TRUNC]] +; CHECK-NEXT: [[RES:%.*]] = load i32, ptr [[ARRAYIDX2]], align 4 +; CHECK-NEXT: ret i32 [[RES]] +; +entry: + br i1 %cond, label %if.then, label %if.end + +if.then: + %arrayidx = getelementptr inbounds i32, ptr %ptr1, i32 %i + %tmp = load i32, ptr %arrayidx, align 4 + store i32 %tmp, ptr %ptr2, align 4 + %idx.ext = sext i32 %i to i64 + br label %if.end + +if.end: + %idx = phi i64 [ 0, %entry ], [ %idx.ext, %if.then ] + %idx.trunc = trunc i64 %idx to i32 + %arrayidx2 = getelementptr inbounds i32, ptr %ptr1, i32 %idx.trunc + %res = load i32, ptr %arrayidx2, align 4 + ret i32 %res +} -- 2.7.4