From: Simon Pilgrim Date: Tue, 20 Apr 2021 16:07:12 +0000 (+0100) Subject: [PhaseOrdering] Add test case for PR36760 X-Git-Tag: llvmorg-14-init~9055 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=da764628e38d098c5776aee309ed3bb63deec7f1;p=platform%2Fupstream%2Fllvm.git [PhaseOrdering] Add test case for PR36760 Ensures that the correct sequence of simplifycfg/instcombine/sroa reduce the IR to just a icmp+select --- diff --git a/llvm/test/Transforms/PhaseOrdering/pr36760.ll b/llvm/test/Transforms/PhaseOrdering/pr36760.ll new file mode 100644 index 0000000..5f8fb9f --- /dev/null +++ b/llvm/test/Transforms/PhaseOrdering/pr36760.ll @@ -0,0 +1,35 @@ +; NOTE: Assertions have been autogenerated by utils/update_test_checks.py +; RUN: opt -O2 -S < %s -enable-new-pm=0 | FileCheck %s +; RUN: opt -passes='default' -S < %s | FileCheck %s + +define i64 @PR36760(i64 %a) { +; CHECK-LABEL: @PR36760( +; CHECK-NEXT: entry: +; CHECK-NEXT: [[TMP0:%.*]] = icmp sgt i64 [[A:%.*]], 0 +; CHECK-NEXT: [[DOTA:%.*]] = select i1 [[TMP0]], i64 [[A]], i64 0 +; CHECK-NEXT: ret i64 [[DOTA]] +; +entry: + %retval = alloca i64, align 8 + %a.addr = alloca i64, align 8 + store i64 %a, i64* %a.addr, align 8 + %0 = load i64, i64* %a.addr, align 8 + %cmp = icmp slt i64 %0, 0 + br i1 %cmp, label %if.then, label %if.end + +if.then: + store i64 0, i64* %retval, align 8 + br label %return + +if.end: + %1 = load i64, i64* %a.addr, align 8 + %shr = ashr i64 %1, 63 + %2 = load i64, i64* %a.addr, align 8 + %xor = xor i64 %shr, %2 + store i64 %xor, i64* %retval, align 8 + br label %return + +return: + %3 = load i64, i64* %retval, align 8 + ret i64 %3 +}