[llvm] 6826d3c - [Test] Add test for PR62430 showing bug in SCEV mul expression creation (NFC)

[Dmitry Makogon via llvm-commits]

Author: Dmitry Makogon
Date: 2023-06-19T15:50:23+07:00
New Revision: 6826d3c513b3366edb6b8fde769b4c5d90c4be19

URL: https://github.com/llvm/llvm-project/commit/6826d3c513b3366edb6b8fde769b4c5d90c4be19
DIFF: https://github.com/llvm/llvm-project/commit/6826d3c513b3366edb6b8fde769b4c5d90c4be19.diff

LOG: [Test] Add test for PR62430 showing bug in SCEV mul expression creation (NFC)

Added: 
    llvm/test/Analysis/ScalarEvolution/pr62430.ll

Modified: 
    

Removed: 
    


################################################################################
diff  --git a/llvm/test/Analysis/ScalarEvolution/pr62430.ll b/llvm/test/Analysis/ScalarEvolution/pr62430.ll
new file mode 100644
index 0000000000000..7aea1442ffef8
--- /dev/null
+++ b/llvm/test/Analysis/ScalarEvolution/pr62430.ll
@@ -0,0 +1,75 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
+; RUN: opt -loop-reduce -S < %s | FileCheck %s
+
+target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128-ni:1-p2:32:8:8:32-ni:2"
+target triple = "x86_64-unknown-linux-gnu"
+
+define void @test() {
+; CHECK-LABEL: define void @test() {
+; CHECK-NEXT:  bb:
+; CHECK-NEXT:    br label [[BB3:%.*]]
+; CHECK:       bb3:
+; CHECK-NEXT:    [[LSR_IV13:%.*]] = phi i32 [ [[LSR_IV_NEXT14:%.*]], [[BB7:%.*]] ], [ 0, [[BB:%.*]] ]
+; CHECK-NEXT:    [[LSR_IV11:%.*]] = phi i32 [ [[LSR_IV_NEXT12:%.*]], [[BB7]] ], [ 98304, [[BB]] ]
+; CHECK-NEXT:    [[LSR_IV9:%.*]] = phi i32 [ [[LSR_IV_NEXT10:%.*]], [[BB7]] ], [ 0, [[BB]] ]
+; CHECK-NEXT:    [[LSR_IV7:%.*]] = phi i32 [ [[LSR_IV_NEXT8:%.*]], [[BB7]] ], [ 147456, [[BB]] ]
+; CHECK-NEXT:    [[LSR_IV5:%.*]] = phi i32 [ [[LSR_IV_NEXT6:%.*]], [[BB7]] ], [ 0, [[BB]] ]
+; CHECK-NEXT:    [[LSR_IV3:%.*]] = phi i32 [ [[LSR_IV_NEXT4:%.*]], [[BB7]] ], [ 57344, [[BB]] ]
+; CHECK-NEXT:    [[LSR_IV1:%.*]] = phi i32 [ [[LSR_IV_NEXT2:%.*]], [[BB7]] ], [ 0, [[BB]] ]
+; CHECK-NEXT:    [[LSR_IV:%.*]] = phi i32 [ [[LSR_IV_NEXT:%.*]], [[BB7]] ], [ 4096, [[BB]] ]
+; CHECK-NEXT:    br label [[BB4:%.*]]
+; CHECK:       bb4:
+; CHECK-NEXT:    [[LSR_IV21:%.*]] = phi i32 [ [[LSR_IV_NEXT22:%.*]], [[BB6:%.*]] ], [ 0, [[BB3]] ]
+; CHECK-NEXT:    [[LSR_IV19:%.*]] = phi i32 [ [[LSR_IV_NEXT20:%.*]], [[BB6]] ], [ [[LSR_IV1]], [[BB3]] ]
+; CHECK-NEXT:    [[LSR_IV17:%.*]] = phi i32 [ [[LSR_IV_NEXT18:%.*]], [[BB6]] ], [ [[LSR_IV5]], [[BB3]] ]
+; CHECK-NEXT:    [[LSR_IV15:%.*]] = phi i32 [ [[LSR_IV_NEXT16:%.*]], [[BB6]] ], [ [[LSR_IV9]], [[BB3]] ]
+; CHECK-NEXT:    br i1 true, label [[BB7]], label [[BB6]]
+; CHECK:       bb6:
+; CHECK-NEXT:    [[LSR_IV_NEXT16]] = add i32 [[LSR_IV15]], [[LSR_IV13]]
+; CHECK-NEXT:    [[LSR_IV_NEXT18]] = add i32 [[LSR_IV17]], [[LSR_IV15]]
+; CHECK-NEXT:    [[LSR_IV_NEXT20]] = add i32 [[LSR_IV19]], [[LSR_IV17]]
+; CHECK-NEXT:    [[LSR_IV_NEXT22]] = add i32 [[LSR_IV21]], [[LSR_IV19]]
+; CHECK-NEXT:    br label [[BB4]]
+; CHECK:       bb7:
+; CHECK-NEXT:    call void @foo(i32 [[LSR_IV21]])
+; CHECK-NEXT:    [[SEXT:%.*]] = sext i32 [[LSR_IV21]] to i64
+; CHECK-NEXT:    [[LSR_IV_NEXT]] = add i32 [[LSR_IV]], 8192
+; CHECK-NEXT:    [[LSR_IV_NEXT2]] = add i32 [[LSR_IV1]], [[LSR_IV]]
+; CHECK-NEXT:    [[LSR_IV_NEXT4]] = add i32 [[LSR_IV3]], 114688
+; CHECK-NEXT:    [[LSR_IV_NEXT6]] = add i32 [[LSR_IV5]], [[LSR_IV3]]
+; CHECK-NEXT:    [[LSR_IV_NEXT8]] = add i32 [[LSR_IV7]], 294912
+; CHECK-NEXT:    [[LSR_IV_NEXT10]] = add i32 [[LSR_IV9]], [[LSR_IV7]]
+; CHECK-NEXT:    [[LSR_IV_NEXT12]] = add i32 [[LSR_IV11]], 196608
+; CHECK-NEXT:    [[LSR_IV_NEXT14]] = add i32 [[LSR_IV13]], [[LSR_IV11]]
+; CHECK-NEXT:    br label [[BB3]]
+;
+bb:
+  br label %bb3
+
+bb3:                                              ; preds = %bb7, %bb
+  %phi = phi i64 [ 0, %bb ], [ %add11, %bb7 ]
+  br label %bb4
+
+bb4:                                              ; preds = %bb6, %bb3
+  %phi5 = phi i32 [ 0, %bb3 ], [ %add, %bb6 ]
+  br i1 true, label %bb7, label %bb6
+
+bb6:                                              ; preds = %bb4
+  %add = add i32 %phi5, 8
+  br label %bb4
+
+bb7:                                              ; preds = %bb4
+  %shl = shl i32 %phi5, 25
+  %mul = mul i64 %phi, %phi
+  %trunc = trunc i64 %mul to i32
+  %add8 = add i32 %shl, %trunc
+  %mul9 = mul i32 %add8, %add8
+  %mul10 = mul i32 %mul9, %add8
+  call void @foo(i32 %mul10)
+  %sext = sext i32 %mul10 to i64
+  %add11 = add i64 %phi, 4
+  br label %bb3
+}
+
+declare void @foo(i32)
+