From c1c5c47e641cf12c2973d70d8e0323ca0a5f6a42 Mon Sep 17 00:00:00 2001
From: Florian Hahn <flo@fhahn.com>
Date: Sat, 18 Apr 2020 19:49:32 +0100
Subject: [PATCH] [SCCP] Add load/store test for integer ranges.

---
 llvm/test/Transforms/SCCP/load-store-range.ll | 323 ++++++++++++++++++++++++++
 1 file changed, 323 insertions(+)
 create mode 100644 llvm/test/Transforms/SCCP/load-store-range.ll

diff --git a/llvm/test/Transforms/SCCP/load-store-range.ll b/llvm/test/Transforms/SCCP/load-store-range.ll
new file mode 100644
index 0000000..2cb74f0
--- /dev/null
+++ b/llvm/test/Transforms/SCCP/load-store-range.ll
@@ -0,0 +1,323 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -ipsccp -S | FileCheck %s
+
+declare void @use(i1)
+
+@G = internal global i32 0
+
+define void @test1a() {
+; CHECK-LABEL: @test1a(
+; CHECK-NEXT:    [[X:%.*]] = load i32, i32* @G
+; CHECK-NEXT:    [[T_1:%.*]] = icmp ne i32 [[X]], 124
+; CHECK-NEXT:    call void @use(i1 [[T_1]])
+; CHECK-NEXT:    [[T_2:%.*]] = icmp ult i32 [[X]], 124
+; CHECK-NEXT:    call void @use(i1 [[T_2]])
+; CHECK-NEXT:    [[F_1:%.*]] = icmp eq i32 [[X]], 124
+; CHECK-NEXT:    call void @use(i1 [[F_1]])
+; CHECK-NEXT:    [[F_2:%.*]] = icmp ugt i32 [[X]], 123
+; CHECK-NEXT:    call void @use(i1 [[F_2]])
+; CHECK-NEXT:    [[C_1:%.*]] = icmp eq i32 [[X]], 20
+; CHECK-NEXT:    call void @use(i1 [[C_1]])
+; CHECK-NEXT:    ret void
+;
+  %X = load i32, i32* @G
+  %t.1 = icmp ne i32 %X, 124
+  call void @use(i1 %t.1)
+  %t.2 = icmp ult i32 %X, 124
+  call void @use(i1 %t.2)
+  %f.1 = icmp eq i32 %X, 124
+  call void @use(i1 %f.1)
+  %f.2 = icmp ugt i32 %X, 123
+  call void @use(i1 %f.2)
+  %c.1 = icmp eq i32 %X, 20
+  call void @use(i1 %c.1)
+  ret void
+}
+
+define void @test1b(i1 %c) {
+; CHECK-LABEL: @test1b(
+; CHECK-NEXT:    br i1 [[C:%.*]], label [[T:%.*]], label [[F:%.*]]
+; CHECK:       T:
+; CHECK-NEXT:    store i32 17, i32* @G
+; CHECK-NEXT:    ret void
+; CHECK:       F:
+; CHECK-NEXT:    store i32 123, i32* @G
+; CHECK-NEXT:    ret void
+;
+  br i1 %c, label %T, label %F
+T:
+  store i32 17, i32* @G
+  ret void
+F:
+  store i32 123, i32* @G
+  ret void
+}
+
+
+@H = internal global i32 0
+
+define void @test2a() {
+; CHECK-LABEL: @test2a(
+; CHECK-NEXT:    [[X:%.*]] = load i32, i32* @H
+; CHECK-NEXT:    [[T_1:%.*]] = icmp ne i32 [[X]], 124
+; CHECK-NEXT:    call void @use(i1 [[T_1]])
+; CHECK-NEXT:    [[T_2:%.*]] = icmp ult i32 [[X]], 124
+; CHECK-NEXT:    call void @use(i1 [[T_2]])
+; CHECK-NEXT:    [[F_1:%.*]] = icmp eq i32 [[X]], 124
+; CHECK-NEXT:    call void @use(i1 [[F_1]])
+; CHECK-NEXT:    [[F_2:%.*]] = icmp ugt i32 [[X]], 123
+; CHECK-NEXT:    call void @use(i1 [[F_2]])
+; CHECK-NEXT:    [[C_1:%.*]] = icmp eq i32 [[X]], 20
+; CHECK-NEXT:    call void @use(i1 [[C_1]])
+; CHECK-NEXT:    ret void
+;
+  %X = load i32, i32* @H
+  %t.1 = icmp ne i32 %X, 124
+  call void @use(i1 %t.1)
+  %t.2 = icmp ult i32 %X, 124
+  call void @use(i1 %t.2)
+  %f.1 = icmp eq i32 %X, 124
+  call void @use(i1 %f.1)
+  %f.2 = icmp ugt i32 %X, 123
+  call void @use(i1 %f.2)
+  %c.1 = icmp eq i32 %X, 20
+  call void @use(i1 %c.1)
+  ret void
+}
+
+define void @test2b(i1 %c.1, i1 %c.2) {
+; CHECK-LABEL: @test2b(
+; CHECK-NEXT:    br i1 [[C_1:%.*]], label [[T:%.*]], label [[F:%.*]]
+; CHECK:       T:
+; CHECK-NEXT:    br i1 [[C_2:%.*]], label [[T_1:%.*]], label [[F_1:%.*]]
+; CHECK:       T.1:
+; CHECK-NEXT:    store i32 17, i32* @H
+; CHECK-NEXT:    ret void
+; CHECK:       F.1:
+; CHECK-NEXT:    store i32 20, i32* @H
+; CHECK-NEXT:    ret void
+; CHECK:       F:
+; CHECK-NEXT:    store i32 123, i32* @H
+; CHECK-NEXT:    ret void
+;
+  br i1 %c.1, label %T, label %F
+T:
+  br i1 %c.2, label %T.1, label %F.1
+
+T.1:
+  store i32 17, i32* @H
+  ret void
+
+F.1:
+  store i32 20, i32* @H
+  ret void
+
+F:
+  store i32 123, i32* @H
+  ret void
+}
+
+
+@I = internal global i32 0
+
+define void @test3a() {
+; CHECK-LABEL: @test3a(
+; CHECK-NEXT:    [[X:%.*]] = load i32, i32* @I
+; CHECK-NEXT:    [[T_1:%.*]] = icmp ne i32 [[X]], 124
+; CHECK-NEXT:    call void @use(i1 [[T_1]])
+; CHECK-NEXT:    [[T_2:%.*]] = icmp ult i32 [[X]], 124
+; CHECK-NEXT:    call void @use(i1 [[T_2]])
+; CHECK-NEXT:    [[F_1:%.*]] = icmp eq i32 [[X]], 124
+; CHECK-NEXT:    call void @use(i1 [[F_1]])
+; CHECK-NEXT:    [[F_2:%.*]] = icmp ugt i32 [[X]], 123
+; CHECK-NEXT:    call void @use(i1 [[F_2]])
+; CHECK-NEXT:    [[C_1:%.*]] = icmp eq i32 [[X]], 20
+; CHECK-NEXT:    call void @use(i1 [[C_1]])
+; CHECK-NEXT:    ret void
+;
+  %X = load i32, i32* @I
+  %t.1 = icmp ne i32 %X, 124
+  call void @use(i1 %t.1)
+  %t.2 = icmp ult i32 %X, 124
+  call void @use(i1 %t.2)
+  %f.1 = icmp eq i32 %X, 124
+  call void @use(i1 %f.1)
+  %f.2 = icmp ugt i32 %X, 123
+  call void @use(i1 %f.2)
+  %c.1 = icmp eq i32 %X, 20
+  call void @use(i1 %c.1)
+  ret void
+}
+
+define void @test3b(i1 %c.1, i1 %c.2) {
+; CHECK-LABEL: @test3b(
+; CHECK-NEXT:    br i1 [[C_1:%.*]], label [[T:%.*]], label [[F:%.*]]
+; CHECK:       T:
+; CHECK-NEXT:    br label [[EXIT:%.*]]
+; CHECK:       F:
+; CHECK-NEXT:    br label [[EXIT]]
+; CHECK:       exit:
+; CHECK-NEXT:    [[P:%.*]] = phi i32 [ 17, [[T]] ], [ 123, [[F]] ]
+; CHECK-NEXT:    store i32 [[P]], i32* @I
+; CHECK-NEXT:    ret void
+;
+  br i1 %c.1, label %T, label %F
+
+T:
+  br label %exit
+
+F:
+  br label %exit
+
+exit:
+  %p = phi i32 [ 17, %T ], [ 123, %F ]
+  store i32 %p, i32* @I
+  ret void
+
+}
+
+; Make sure stored values are correctly updated to overdefined.
+@J = internal global i32 0
+
+define void @test4a() {
+; CHECK-LABEL: @test4a(
+; CHECK-NEXT:    [[X:%.*]] = load i32, i32* @J
+; CHECK-NEXT:    [[C_1:%.*]] = icmp ne i32 [[X]], 124
+; CHECK-NEXT:    call void @use(i1 [[C_1]])
+; CHECK-NEXT:    [[C_2:%.*]] = icmp ult i32 [[X]], 124
+; CHECK-NEXT:    call void @use(i1 [[C_2]])
+; CHECK-NEXT:    [[C_3:%.*]] = icmp eq i32 [[X]], 124
+; CHECK-NEXT:    call void @use(i1 [[C_3]])
+; CHECK-NEXT:    [[C_4:%.*]] = icmp ugt i32 [[X]], 123
+; CHECK-NEXT:    call void @use(i1 [[C_4]])
+; CHECK-NEXT:    [[C_5:%.*]] = icmp eq i32 [[X]], 20
+; CHECK-NEXT:    call void @use(i1 [[C_5]])
+; CHECK-NEXT:    ret void
+;
+  %X = load i32, i32* @J
+  %c.1 = icmp ne i32 %X, 124
+  call void @use(i1 %c.1)
+  %c.2 = icmp ult i32 %X, 124
+  call void @use(i1 %c.2)
+  %c.3 = icmp eq i32 %X, 124
+  call void @use(i1 %c.3)
+  %c.4 = icmp ugt i32 %X, 123
+  call void @use(i1 %c.4)
+  %c.5 = icmp eq i32 %X, 20
+  call void @use(i1 %c.5)
+  ret void
+}
+
+define void @test4b(i1 %c.1, i1 %c.2, i32 %x) {
+; CHECK-LABEL: @test4b(
+; CHECK-NEXT:    br i1 [[C_1:%.*]], label [[T:%.*]], label [[F:%.*]]
+; CHECK:       T:
+; CHECK-NEXT:    br i1 [[C_2:%.*]], label [[T_1:%.*]], label [[F_1:%.*]]
+; CHECK:       T.1:
+; CHECK-NEXT:    br label [[EXIT:%.*]]
+; CHECK:       F.1:
+; CHECK-NEXT:    br label [[EXIT]]
+; CHECK:       F:
+; CHECK-NEXT:    br label [[EXIT]]
+; CHECK:       exit:
+; CHECK-NEXT:    [[P:%.*]] = phi i32 [ 17, [[T_1]] ], [ [[X:%.*]], [[F_1]] ], [ 123, [[F]] ]
+; CHECK-NEXT:    store i32 [[P]], i32* @J
+; CHECK-NEXT:    ret void
+;
+  br i1 %c.1, label %T, label %F
+T:
+  br i1 %c.2, label %T.1, label %F.1
+
+T.1:
+  br label %exit
+
+F.1:
+  br label %exit
+
+F:
+  br label %exit
+
+exit:
+  %p = phi i32 [ 17, %T.1 ], [ %x, %F.1 ], [ 123, %F ]
+  store i32 %p, i32* @J
+  ret void
+}
+
+; Same as test1, but storing 4 different values.
+
+@K = internal global i32 0
+
+define void @test5a() {
+; CHECK-LABEL: @test5a(
+; CHECK-NEXT:    [[X:%.*]] = load i32, i32* @K
+; CHECK-NEXT:    [[T_1:%.*]] = icmp ne i32 [[X]], 499
+; CHECK-NEXT:    call void @use(i1 [[T_1]])
+; CHECK-NEXT:    [[T_2:%.*]] = icmp ult i32 [[X]], 600
+; CHECK-NEXT:    call void @use(i1 [[T_2]])
+; CHECK-NEXT:    [[F_1:%.*]] = icmp eq i32 [[X]], 600
+; CHECK-NEXT:    call void @use(i1 [[F_1]])
+; CHECK-NEXT:    [[F_2:%.*]] = icmp ugt i32 [[X]], 600
+; CHECK-NEXT:    call void @use(i1 [[F_2]])
+; CHECK-NEXT:    [[C_1:%.*]] = icmp eq i32 [[X]], 510
+; CHECK-NEXT:    call void @use(i1 [[C_1]])
+; CHECK-NEXT:    ret void
+;
+  %X = load i32, i32* @K
+  %t.1 = icmp ne i32 %X, 499
+  call void @use(i1 %t.1)
+  %t.2 = icmp ult i32 %X, 600
+  call void @use(i1 %t.2)
+  %f.1 = icmp eq i32 %X, 600
+  call void @use(i1 %f.1)
+  %f.2 = icmp ugt i32 %X, 600
+  call void @use(i1 %f.2)
+  %c.1 = icmp eq i32 %X, 510
+  call void @use(i1 %c.1)
+  ret void
+}
+
+define void @test5b(i1 %c.1, i1 %c.2) {
+; CHECK-LABEL: @test5b(
+; CHECK-NEXT:    br i1 [[C_1:%.*]], label [[T_1:%.*]], label [[F_1:%.*]]
+; CHECK:       T.1:
+; CHECK-NEXT:    br i1 [[C_2:%.*]], label [[T_2:%.*]], label [[F_2:%.*]]
+; CHECK:       T.2:
+; CHECK-NEXT:    store i32 500, i32* @K
+; CHECK-NEXT:    ret void
+; CHECK:       F.2:
+; CHECK-NEXT:    store i32 510, i32* @K
+; CHECK-NEXT:    ret void
+; CHECK:       F.1:
+; CHECK-NEXT:    br i1 [[C_2]], label [[T_3:%.*]], label [[F_3:%.*]]
+; CHECK:       T.3:
+; CHECK-NEXT:    store i32 520, i32* @K
+; CHECK-NEXT:    ret void
+; CHECK:       F.3:
+; CHECK-NEXT:    store i32 530, i32* @K
+; CHECK-NEXT:    ret void
+;
+  br i1 %c.1, label %T.1, label %F.1
+
+T.1:
+  br i1 %c.2, label %T.2, label %F.2
+
+T.2:
+  store i32 500, i32* @K
+  ret void
+
+F.2:
+  store i32 510, i32* @K
+  ret void
+
+F.1:
+  br i1 %c.2, label %T.3, label %F.3
+
+T.3:
+  store i32 520, i32* @K
+  ret void
+
+F.3:
+  store i32 530, i32* @K
+  ret void
+
+}
-- 
2.7.4