[ConstraintElim] Add pointer induction tests with struct types.

Extra tests for D152730.

diff --git a/llvm/test/Transforms/ConstraintElimination/monotonic-pointer-phis-struct-types.ll b/llvm/test/Transforms/ConstraintElimination/monotonic-pointer-phis-struct-types.ll
new file mode 100644 (file)
index 0000000..a4d51e6
--- /dev/null
+++ b/llvm/test/Transforms/ConstraintElimination/monotonic-pointer-phis-struct-types.ll
@@ -0,0 +1,520 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt -passes=constraint-elimination -S %s | FileCheck %s
+
+target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
+
+
+declare void @use(ptr)
+declare void @use.i1(i1)
+declare void @llvm.assume(i1)
+declare i1 @cond()
+
+define void @test_monotonic_ptr_iv_inc_1_struct_type(ptr %start, i16 %len) {
+; CHECK-LABEL: @test_monotonic_ptr_iv_inc_1_struct_type(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[UPPER:%.*]] = getelementptr inbounds { i16, i8, i8 }, ptr [[START:%.*]], i16 [[LEN:%.*]]
+; CHECK-NEXT:    [[LEN_NEG:%.*]] = icmp slt i16 [[LEN]], 0
+; CHECK-NEXT:    br i1 [[LEN_NEG]], label [[EXIT:%.*]], label [[LOOP_PH:%.*]]
+; CHECK:       loop.ph:
+; CHECK-NEXT:    br label [[LOOP_HEADER:%.*]]
+; CHECK:       loop.header:
+; CHECK-NEXT:    [[PTR_IV:%.*]] = phi ptr [ [[START]], [[LOOP_PH]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ]
+; CHECK-NEXT:    [[C:%.*]] = icmp eq ptr [[PTR_IV]], [[UPPER]]
+; CHECK-NEXT:    br i1 [[C]], label [[EXIT]], label [[FOR_BODY:%.*]]
+; CHECK:       for.body:
+; CHECK-NEXT:    [[T_1:%.*]] = icmp uge ptr [[PTR_IV]], [[START]]
+; CHECK-NEXT:    [[T_2:%.*]] = icmp ult ptr [[PTR_IV]], [[UPPER]]
+; CHECK-NEXT:    [[AND:%.*]] = and i1 [[T_1]], [[T_2]]
+; CHECK-NEXT:    br i1 [[AND]], label [[LOOP_LATCH]], label [[EXIT]]
+; CHECK:       loop.latch:
+; CHECK-NEXT:    call void @use(ptr [[PTR_IV]])
+; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, ptr [[PTR_IV]], i16 1
+; CHECK-NEXT:    br label [[LOOP_HEADER]]
+; CHECK:       exit:
+; CHECK-NEXT:    ret void
+;
+entry:
+  %upper = getelementptr inbounds {i16, i8, i8}, ptr %start, i16 %len
+  %len.neg = icmp slt i16 %len, 0
+  br i1 %len.neg, label %exit, label %loop.ph
+
+loop.ph:
+  br label %loop.header
+
+loop.header:
+  %ptr.iv = phi ptr [ %start, %loop.ph ], [ %ptr.iv.next, %loop.latch ]
+  %c = icmp eq ptr %ptr.iv, %upper
+  br i1 %c, label %exit, label %for.body
+
+for.body:
+  %t.1 = icmp uge ptr %ptr.iv, %start
+  %t.2 = icmp ult ptr %ptr.iv, %upper
+  %and = and i1 %t.1, %t.2
+  br i1 %and, label %loop.latch, label %exit
+
+loop.latch:
+  call void @use(ptr %ptr.iv)
+  %ptr.iv.next = getelementptr inbounds i32, ptr %ptr.iv, i16 1
+  br label %loop.header
+
+exit:
+  ret void
+}
+
+define void @test_monotonic_ptr_iv_inc_1_struct_type_offset_0(ptr %start, i16 %len) {
+; CHECK-LABEL: @test_monotonic_ptr_iv_inc_1_struct_type_offset_0(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[UPPER:%.*]] = getelementptr inbounds { i16, i8, i8 }, ptr [[START:%.*]], i16 [[LEN:%.*]], i32 0
+; CHECK-NEXT:    [[LEN_NEG:%.*]] = icmp slt i16 [[LEN]], 0
+; CHECK-NEXT:    br i1 [[LEN_NEG]], label [[EXIT:%.*]], label [[LOOP_PH:%.*]]
+; CHECK:       loop.ph:
+; CHECK-NEXT:    br label [[LOOP_HEADER:%.*]]
+; CHECK:       loop.header:
+; CHECK-NEXT:    [[PTR_IV:%.*]] = phi ptr [ [[START]], [[LOOP_PH]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ]
+; CHECK-NEXT:    [[C:%.*]] = icmp eq ptr [[PTR_IV]], [[UPPER]]
+; CHECK-NEXT:    br i1 [[C]], label [[EXIT]], label [[FOR_BODY:%.*]]
+; CHECK:       for.body:
+; CHECK-NEXT:    [[T_1:%.*]] = icmp uge ptr [[PTR_IV]], [[START]]
+; CHECK-NEXT:    [[T_2:%.*]] = icmp ult ptr [[PTR_IV]], [[UPPER]]
+; CHECK-NEXT:    [[AND:%.*]] = and i1 [[T_1]], [[T_2]]
+; CHECK-NEXT:    br i1 [[AND]], label [[LOOP_LATCH]], label [[EXIT]]
+; CHECK:       loop.latch:
+; CHECK-NEXT:    call void @use(ptr [[PTR_IV]])
+; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, ptr [[PTR_IV]], i16 1
+; CHECK-NEXT:    br label [[LOOP_HEADER]]
+; CHECK:       exit:
+; CHECK-NEXT:    ret void
+;
+entry:
+  %upper = getelementptr inbounds {i16, i8, i8}, ptr %start, i16 %len, i32 0
+  %len.neg = icmp slt i16 %len, 0
+  br i1 %len.neg, label %exit, label %loop.ph
+
+loop.ph:
+  br label %loop.header
+
+loop.header:
+  %ptr.iv = phi ptr [ %start, %loop.ph ], [ %ptr.iv.next, %loop.latch ]
+  %c = icmp eq ptr %ptr.iv, %upper
+  br i1 %c, label %exit, label %for.body
+
+for.body:
+  %t.1 = icmp uge ptr %ptr.iv, %start
+  %t.2 = icmp ult ptr %ptr.iv, %upper
+  %and = and i1 %t.1, %t.2
+  br i1 %and, label %loop.latch, label %exit
+
+loop.latch:
+  call void @use(ptr %ptr.iv)
+  %ptr.iv.next = getelementptr inbounds i32, ptr %ptr.iv, i16 1
+  br label %loop.header
+
+exit:
+  ret void
+}
+
+define void @test_monotonic_ptr_iv_inc_1_struct_type_offset_16(ptr %start, i16 %len) {
+; CHECK-LABEL: @test_monotonic_ptr_iv_inc_1_struct_type_offset_16(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[UPPER:%.*]] = getelementptr inbounds { i16, i8, i8 }, ptr [[START:%.*]], i16 [[LEN:%.*]], i32 1
+; CHECK-NEXT:    [[LEN_NEG:%.*]] = icmp slt i16 [[LEN]], 0
+; CHECK-NEXT:    br i1 [[LEN_NEG]], label [[EXIT:%.*]], label [[LOOP_PH:%.*]]
+; CHECK:       loop.ph:
+; CHECK-NEXT:    br label [[LOOP_HEADER:%.*]]
+; CHECK:       loop.header:
+; CHECK-NEXT:    [[PTR_IV:%.*]] = phi ptr [ [[START]], [[LOOP_PH]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ]
+; CHECK-NEXT:    [[C:%.*]] = icmp eq ptr [[PTR_IV]], [[UPPER]]
+; CHECK-NEXT:    br i1 [[C]], label [[EXIT]], label [[FOR_BODY:%.*]]
+; CHECK:       for.body:
+; CHECK-NEXT:    [[T_1:%.*]] = icmp uge ptr [[PTR_IV]], [[START]]
+; CHECK-NEXT:    [[T_2:%.*]] = icmp ult ptr [[PTR_IV]], [[UPPER]]
+; CHECK-NEXT:    [[AND:%.*]] = and i1 [[T_1]], [[T_2]]
+; CHECK-NEXT:    br i1 [[AND]], label [[LOOP_LATCH]], label [[EXIT]]
+; CHECK:       loop.latch:
+; CHECK-NEXT:    call void @use(ptr [[PTR_IV]])
+; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, ptr [[PTR_IV]], i16 1
+; CHECK-NEXT:    br label [[LOOP_HEADER]]
+; CHECK:       exit:
+; CHECK-NEXT:    ret void
+;
+entry:
+  %upper = getelementptr inbounds {i16, i8, i8}, ptr %start, i16 %len, i32 1
+  %len.neg = icmp slt i16 %len, 0
+  br i1 %len.neg, label %exit, label %loop.ph
+
+loop.ph:
+  br label %loop.header
+
+loop.header:
+  %ptr.iv = phi ptr [ %start, %loop.ph ], [ %ptr.iv.next, %loop.latch ]
+  %c = icmp eq ptr %ptr.iv, %upper
+  br i1 %c, label %exit, label %for.body
+
+for.body:
+  %t.1 = icmp uge ptr %ptr.iv, %start
+  %t.2 = icmp ult ptr %ptr.iv, %upper
+  %and = and i1 %t.1, %t.2
+  br i1 %and, label %loop.latch, label %exit
+
+loop.latch:
+  call void @use(ptr %ptr.iv)
+  %ptr.iv.next = getelementptr inbounds i32, ptr %ptr.iv, i16 1
+  br label %loop.header
+
+exit:
+  ret void
+}
+
+define void @test_monotonic_ptr_iv_inc_1_struct_type_with_early_exit(ptr %start, i16 %len) {
+; CHECK-LABEL: @test_monotonic_ptr_iv_inc_1_struct_type_with_early_exit(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[UPPER:%.*]] = getelementptr inbounds { i16, i8, i8 }, ptr [[START:%.*]], i16 [[LEN:%.*]], i32 0
+; CHECK-NEXT:    [[LEN_NEG:%.*]] = icmp slt i16 [[LEN]], 0
+; CHECK-NEXT:    br i1 [[LEN_NEG]], label [[EXIT:%.*]], label [[LOOP_PH:%.*]]
+; CHECK:       loop.ph:
+; CHECK-NEXT:    br label [[LOOP_HEADER:%.*]]
+; CHECK:       loop.header:
+; CHECK-NEXT:    [[PTR_IV:%.*]] = phi ptr [ [[START]], [[LOOP_PH]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ]
+; CHECK-NEXT:    [[C:%.*]] = icmp eq ptr [[PTR_IV]], [[UPPER]]
+; CHECK-NEXT:    br i1 [[C]], label [[EXIT]], label [[FOR_BODY:%.*]]
+; CHECK:       for.body:
+; CHECK-NEXT:    [[C_1:%.*]] = call i1 @cond()
+; CHECK-NEXT:    br i1 [[C_1]], label [[LOOP_NEXT:%.*]], label [[EXIT]]
+; CHECK:       loop.next:
+; CHECK-NEXT:    [[T_1:%.*]] = icmp uge ptr [[PTR_IV]], [[START]]
+; CHECK-NEXT:    [[T_2:%.*]] = icmp ult ptr [[PTR_IV]], [[UPPER]]
+; CHECK-NEXT:    [[AND:%.*]] = and i1 [[T_1]], [[T_2]]
+; CHECK-NEXT:    br i1 [[AND]], label [[LOOP_LATCH]], label [[EXIT]]
+; CHECK:       loop.latch:
+; CHECK-NEXT:    call void @use(ptr [[PTR_IV]])
+; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, ptr [[PTR_IV]], i16 1
+; CHECK-NEXT:    br label [[LOOP_HEADER]]
+; CHECK:       exit:
+; CHECK-NEXT:    ret void
+;
+entry:
+  %upper = getelementptr inbounds {i16, i8, i8}, ptr %start, i16 %len, i32 0
+  %len.neg = icmp slt i16 %len, 0
+  br i1 %len.neg, label %exit, label %loop.ph
+
+loop.ph:
+  br label %loop.header
+
+loop.header:
+  %ptr.iv = phi ptr [ %start, %loop.ph ], [ %ptr.iv.next, %loop.latch ]
+  %c = icmp eq ptr %ptr.iv, %upper
+  br i1 %c, label %exit, label %for.body
+
+for.body:
+  %c.1 = call i1 @cond()
+  br i1 %c.1, label %loop.next, label %exit
+
+loop.next:
+  %t.1 = icmp uge ptr %ptr.iv, %start
+  %t.2 = icmp ult ptr %ptr.iv, %upper
+  %and = and i1 %t.1, %t.2
+  br i1 %and, label %loop.latch, label %exit
+
+loop.latch:
+  call void @use(ptr %ptr.iv)
+  %ptr.iv.next = getelementptr inbounds i32, ptr %ptr.iv, i16 1
+  br label %loop.header
+
+exit:
+  ret void
+}
+
+define void @test_monotonic_ptr_iv_inc_1_struct_type_offset_0_with_early_exit(ptr %start, i16 %len) {
+; CHECK-LABEL: @test_monotonic_ptr_iv_inc_1_struct_type_offset_0_with_early_exit(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[UPPER:%.*]] = getelementptr inbounds { i16, i8, i8 }, ptr [[START:%.*]], i16 [[LEN:%.*]], i32 0
+; CHECK-NEXT:    [[LEN_NEG:%.*]] = icmp slt i16 [[LEN]], 0
+; CHECK-NEXT:    br i1 [[LEN_NEG]], label [[EXIT:%.*]], label [[LOOP_PH:%.*]]
+; CHECK:       loop.ph:
+; CHECK-NEXT:    br label [[LOOP_HEADER:%.*]]
+; CHECK:       loop.header:
+; CHECK-NEXT:    [[PTR_IV:%.*]] = phi ptr [ [[START]], [[LOOP_PH]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ]
+; CHECK-NEXT:    [[C:%.*]] = icmp eq ptr [[PTR_IV]], [[UPPER]]
+; CHECK-NEXT:    br i1 [[C]], label [[EXIT]], label [[FOR_BODY:%.*]]
+; CHECK:       for.body:
+; CHECK-NEXT:    [[C_1:%.*]] = call i1 @cond()
+; CHECK-NEXT:    br i1 [[C_1]], label [[LOOP_NEXT:%.*]], label [[EXIT]]
+; CHECK:       loop.next:
+; CHECK-NEXT:    [[T_1:%.*]] = icmp uge ptr [[PTR_IV]], [[START]]
+; CHECK-NEXT:    [[T_2:%.*]] = icmp ult ptr [[PTR_IV]], [[UPPER]]
+; CHECK-NEXT:    [[AND:%.*]] = and i1 [[T_1]], [[T_2]]
+; CHECK-NEXT:    br i1 [[AND]], label [[LOOP_LATCH]], label [[EXIT]]
+; CHECK:       loop.latch:
+; CHECK-NEXT:    call void @use(ptr [[PTR_IV]])
+; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, ptr [[PTR_IV]], i16 1
+; CHECK-NEXT:    br label [[LOOP_HEADER]]
+; CHECK:       exit:
+; CHECK-NEXT:    ret void
+;
+entry:
+  %upper = getelementptr inbounds {i16, i8, i8}, ptr %start, i16 %len, i32 0
+  %len.neg = icmp slt i16 %len, 0
+  br i1 %len.neg, label %exit, label %loop.ph
+
+loop.ph:
+  br label %loop.header
+
+loop.header:
+  %ptr.iv = phi ptr [ %start, %loop.ph ], [ %ptr.iv.next, %loop.latch ]
+  %c = icmp eq ptr %ptr.iv, %upper
+  br i1 %c, label %exit, label %for.body
+
+for.body:
+  %c.1 = call i1 @cond()
+  br i1 %c.1, label %loop.next, label %exit
+
+loop.next:
+  %t.1 = icmp uge ptr %ptr.iv, %start
+  %t.2 = icmp ult ptr %ptr.iv, %upper
+  %and = and i1 %t.1, %t.2
+  br i1 %and, label %loop.latch, label %exit
+
+loop.latch:
+  call void @use(ptr %ptr.iv)
+  %ptr.iv.next = getelementptr inbounds i32, ptr %ptr.iv, i16 1
+  br label %loop.header
+
+exit:
+  ret void
+}
+
+define void @test_monotonic_ptr_iv_inc_1_struct_type_offset_16_with_early_exit(ptr %start, i16 %len) {
+; CHECK-LABEL: @test_monotonic_ptr_iv_inc_1_struct_type_offset_16_with_early_exit(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[UPPER:%.*]] = getelementptr inbounds { i16, i8, i8 }, ptr [[START:%.*]], i16 [[LEN:%.*]], i32 1
+; CHECK-NEXT:    [[LEN_NEG:%.*]] = icmp slt i16 [[LEN]], 0
+; CHECK-NEXT:    br i1 [[LEN_NEG]], label [[EXIT:%.*]], label [[LOOP_PH:%.*]]
+; CHECK:       loop.ph:
+; CHECK-NEXT:    br label [[LOOP_HEADER:%.*]]
+; CHECK:       loop.header:
+; CHECK-NEXT:    [[PTR_IV:%.*]] = phi ptr [ [[START]], [[LOOP_PH]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ]
+; CHECK-NEXT:    [[C:%.*]] = icmp eq ptr [[PTR_IV]], [[UPPER]]
+; CHECK-NEXT:    br i1 [[C]], label [[EXIT]], label [[FOR_BODY:%.*]]
+; CHECK:       for.body:
+; CHECK-NEXT:    [[C_1:%.*]] = call i1 @cond()
+; CHECK-NEXT:    br i1 [[C_1]], label [[LOOP_NEXT:%.*]], label [[EXIT]]
+; CHECK:       loop.next:
+; CHECK-NEXT:    [[T_1:%.*]] = icmp uge ptr [[PTR_IV]], [[START]]
+; CHECK-NEXT:    [[T_2:%.*]] = icmp ult ptr [[PTR_IV]], [[UPPER]]
+; CHECK-NEXT:    [[AND:%.*]] = and i1 [[T_1]], [[T_2]]
+; CHECK-NEXT:    br i1 [[AND]], label [[LOOP_LATCH]], label [[EXIT]]
+; CHECK:       loop.latch:
+; CHECK-NEXT:    call void @use(ptr [[PTR_IV]])
+; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, ptr [[PTR_IV]], i16 1
+; CHECK-NEXT:    br label [[LOOP_HEADER]]
+; CHECK:       exit:
+; CHECK-NEXT:    ret void
+;
+entry:
+  %upper = getelementptr inbounds {i16, i8, i8}, ptr %start, i16 %len, i32 1
+  %len.neg = icmp slt i16 %len, 0
+  br i1 %len.neg, label %exit, label %loop.ph
+
+loop.ph:
+  br label %loop.header
+
+loop.header:
+  %ptr.iv = phi ptr [ %start, %loop.ph ], [ %ptr.iv.next, %loop.latch ]
+  %c = icmp eq ptr %ptr.iv, %upper
+  br i1 %c, label %exit, label %for.body
+
+for.body:
+  %c.1 = call i1 @cond()
+  br i1 %c.1, label %loop.next, label %exit
+
+loop.next:
+  %t.1 = icmp uge ptr %ptr.iv, %start
+  %t.2 = icmp ult ptr %ptr.iv, %upper
+  %and = and i1 %t.1, %t.2
+  br i1 %and, label %loop.latch, label %exit
+
+loop.latch:
+  call void @use(ptr %ptr.iv)
+  %ptr.iv.next = getelementptr inbounds i32, ptr %ptr.iv, i16 1
+  br label %loop.header
+
+exit:
+  ret void
+}
+
+define void @test_monotonic_ptr_iv_inc_2_struct_type_with_early_exit(ptr %start, i16 %len) {
+; CHECK-LABEL: @test_monotonic_ptr_iv_inc_2_struct_type_with_early_exit(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[UPPER:%.*]] = getelementptr inbounds i32, ptr [[START:%.*]], i16 [[LEN:%.*]]
+; CHECK-NEXT:    [[LEN_NEG:%.*]] = icmp slt i16 [[LEN]], 0
+; CHECK-NEXT:    br i1 [[LEN_NEG]], label [[EXIT:%.*]], label [[LOOP_PH:%.*]]
+; CHECK:       loop.ph:
+; CHECK-NEXT:    br label [[LOOP_HEADER:%.*]]
+; CHECK:       loop.header:
+; CHECK-NEXT:    [[PTR_IV:%.*]] = phi ptr [ [[START]], [[LOOP_PH]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ]
+; CHECK-NEXT:    [[C:%.*]] = icmp eq ptr [[PTR_IV]], [[UPPER]]
+; CHECK-NEXT:    br i1 [[C]], label [[EXIT]], label [[FOR_BODY:%.*]]
+; CHECK:       for.body:
+; CHECK-NEXT:    [[C_1:%.*]] = call i1 @cond()
+; CHECK-NEXT:    br i1 [[C_1]], label [[LOOP_NEXT:%.*]], label [[EXIT]]
+; CHECK:       loop.next:
+; CHECK-NEXT:    [[T_1:%.*]] = icmp uge ptr [[PTR_IV]], [[START]]
+; CHECK-NEXT:    [[T_2:%.*]] = icmp ult ptr [[PTR_IV]], [[UPPER]]
+; CHECK-NEXT:    [[AND:%.*]] = and i1 [[T_1]], [[T_2]]
+; CHECK-NEXT:    br i1 [[AND]], label [[LOOP_LATCH]], label [[EXIT]]
+; CHECK:       loop.latch:
+; CHECK-NEXT:    call void @use(ptr [[PTR_IV]])
+; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds { i16, i8, i8 }, ptr [[PTR_IV]], i16 1
+; CHECK-NEXT:    br label [[LOOP_HEADER]]
+; CHECK:       exit:
+; CHECK-NEXT:    ret void
+;
+entry:
+  %upper = getelementptr inbounds i32, ptr %start, i16 %len
+  %len.neg = icmp slt i16 %len, 0
+  br i1 %len.neg, label %exit, label %loop.ph
+
+loop.ph:
+  br label %loop.header
+
+loop.header:
+  %ptr.iv = phi ptr [ %start, %loop.ph ], [ %ptr.iv.next, %loop.latch ]
+  %c = icmp eq ptr %ptr.iv, %upper
+  br i1 %c, label %exit, label %for.body
+
+for.body:
+  %c.1 = call i1 @cond()
+  br i1 %c.1, label %loop.next, label %exit
+
+loop.next:
+  %t.1 = icmp uge ptr %ptr.iv, %start
+  %t.2 = icmp ult ptr %ptr.iv, %upper
+  %and = and i1 %t.1, %t.2
+  br i1 %and, label %loop.latch, label %exit
+
+loop.latch:
+  call void @use(ptr %ptr.iv)
+  %ptr.iv.next = getelementptr inbounds {i16, i8, i8}, ptr %ptr.iv, i16 1
+  br label %loop.header
+
+exit:
+  ret void
+}
+
+define void @test_monotonic_ptr_iv_inc_2_struct_type_offset_0_with_early_exit(ptr %start, i16 %len) {
+; CHECK-LABEL: @test_monotonic_ptr_iv_inc_2_struct_type_offset_0_with_early_exit(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[UPPER:%.*]] = getelementptr inbounds i32, ptr [[START:%.*]], i16 [[LEN:%.*]]
+; CHECK-NEXT:    [[LEN_NEG:%.*]] = icmp slt i16 [[LEN]], 0
+; CHECK-NEXT:    br i1 [[LEN_NEG]], label [[EXIT:%.*]], label [[LOOP_PH:%.*]]
+; CHECK:       loop.ph:
+; CHECK-NEXT:    br label [[LOOP_HEADER:%.*]]
+; CHECK:       loop.header:
+; CHECK-NEXT:    [[PTR_IV:%.*]] = phi ptr [ [[START]], [[LOOP_PH]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ]
+; CHECK-NEXT:    [[C:%.*]] = icmp eq ptr [[PTR_IV]], [[UPPER]]
+; CHECK-NEXT:    br i1 [[C]], label [[EXIT]], label [[FOR_BODY:%.*]]
+; CHECK:       for.body:
+; CHECK-NEXT:    [[C_1:%.*]] = call i1 @cond()
+; CHECK-NEXT:    br i1 [[C_1]], label [[LOOP_NEXT:%.*]], label [[EXIT]]
+; CHECK:       loop.next:
+; CHECK-NEXT:    [[T_1:%.*]] = icmp uge ptr [[PTR_IV]], [[START]]
+; CHECK-NEXT:    [[T_2:%.*]] = icmp ult ptr [[PTR_IV]], [[UPPER]]
+; CHECK-NEXT:    [[AND:%.*]] = and i1 [[T_1]], [[T_2]]
+; CHECK-NEXT:    br i1 [[AND]], label [[LOOP_LATCH]], label [[EXIT]]
+; CHECK:       loop.latch:
+; CHECK-NEXT:    call void @use(ptr [[PTR_IV]])
+; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds { i16, i8, i8 }, ptr [[PTR_IV]], i16 1, i32 0
+; CHECK-NEXT:    br label [[LOOP_HEADER]]
+; CHECK:       exit:
+; CHECK-NEXT:    ret void
+;
+entry:
+  %upper = getelementptr inbounds i32, ptr %start, i16 %len
+  %len.neg = icmp slt i16 %len, 0
+  br i1 %len.neg, label %exit, label %loop.ph
+
+loop.ph:
+  br label %loop.header
+
+loop.header:
+  %ptr.iv = phi ptr [ %start, %loop.ph ], [ %ptr.iv.next, %loop.latch ]
+  %c = icmp eq ptr %ptr.iv, %upper
+  br i1 %c, label %exit, label %for.body
+
+for.body:
+  %c.1 = call i1 @cond()
+  br i1 %c.1, label %loop.next, label %exit
+
+loop.next:
+  %t.1 = icmp uge ptr %ptr.iv, %start
+  %t.2 = icmp ult ptr %ptr.iv, %upper
+  %and = and i1 %t.1, %t.2
+  br i1 %and, label %loop.latch, label %exit
+
+loop.latch:
+  call void @use(ptr %ptr.iv)
+  %ptr.iv.next = getelementptr inbounds {i16, i8, i8}, ptr %ptr.iv, i16 1, i32 0
+  br label %loop.header
+
+exit:
+  ret void
+}
+
+define void @test_monotonic_ptr_iv_inc_2_struct_type_offset_16_with_early_exit(ptr %start, i16 %len) {
+; CHECK-LABEL: @test_monotonic_ptr_iv_inc_2_struct_type_offset_16_with_early_exit(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[UPPER:%.*]] = getelementptr inbounds i32, ptr [[START:%.*]], i16 [[LEN:%.*]]
+; CHECK-NEXT:    [[LEN_NEG:%.*]] = icmp slt i16 [[LEN]], 0
+; CHECK-NEXT:    br i1 [[LEN_NEG]], label [[EXIT:%.*]], label [[LOOP_PH:%.*]]
+; CHECK:       loop.ph:
+; CHECK-NEXT:    br label [[LOOP_HEADER:%.*]]
+; CHECK:       loop.header:
+; CHECK-NEXT:    [[PTR_IV:%.*]] = phi ptr [ [[START]], [[LOOP_PH]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ]
+; CHECK-NEXT:    [[C:%.*]] = icmp eq ptr [[PTR_IV]], [[UPPER]]
+; CHECK-NEXT:    br i1 [[C]], label [[EXIT]], label [[FOR_BODY:%.*]]
+; CHECK:       for.body:
+; CHECK-NEXT:    [[C_1:%.*]] = call i1 @cond()
+; CHECK-NEXT:    br i1 [[C_1]], label [[LOOP_NEXT:%.*]], label [[EXIT]]
+; CHECK:       loop.next:
+; CHECK-NEXT:    [[T_1:%.*]] = icmp uge ptr [[PTR_IV]], [[START]]
+; CHECK-NEXT:    [[T_2:%.*]] = icmp ult ptr [[PTR_IV]], [[UPPER]]
+; CHECK-NEXT:    [[AND:%.*]] = and i1 [[T_1]], [[T_2]]
+; CHECK-NEXT:    br i1 [[AND]], label [[LOOP_LATCH]], label [[EXIT]]
+; CHECK:       loop.latch:
+; CHECK-NEXT:    call void @use(ptr [[PTR_IV]])
+; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds { i16, i8, i8 }, ptr [[PTR_IV]], i16 1, i32 1
+; CHECK-NEXT:    br label [[LOOP_HEADER]]
+; CHECK:       exit:
+; CHECK-NEXT:    ret void
+;
+entry:
+  %upper = getelementptr inbounds i32, ptr %start, i16 %len
+  %len.neg = icmp slt i16 %len, 0
+  br i1 %len.neg, label %exit, label %loop.ph
+
+loop.ph:
+  br label %loop.header
+
+loop.header:
+  %ptr.iv = phi ptr [ %start, %loop.ph ], [ %ptr.iv.next, %loop.latch ]
+  %c = icmp eq ptr %ptr.iv, %upper
+  br i1 %c, label %exit, label %for.body
+
+for.body:
+  %c.1 = call i1 @cond()
+  br i1 %c.1, label %loop.next, label %exit
+
+loop.next:
+  %t.1 = icmp uge ptr %ptr.iv, %start
+  %t.2 = icmp ult ptr %ptr.iv, %upper
+  %and = and i1 %t.1, %t.2
+  br i1 %and, label %loop.latch, label %exit
+
+loop.latch:
+  call void @use(ptr %ptr.iv)
+  %ptr.iv.next = getelementptr inbounds {i16, i8, i8}, ptr %ptr.iv, i16 1, i32 1
+  br label %loop.header
+
+exit:
+  ret void
+}

diff --git a/llvm/test/Transforms/ConstraintElimination/monotonic-pointer-phis.ll b/llvm/test/Transforms/ConstraintElimination/monotonic-pointer-phis.ll
index 11f819c..aedfad6 100644 (file)
--- a/llvm/test/Transforms/ConstraintElimination/monotonic-pointer-phis.ll
+++ b/llvm/test/Transforms/ConstraintElimination/monotonic-pointer-phis.ll
@@ -1252,6 +1252,66 @@ exit:
   ret void
 }
 
+define void @test_monotonic_ptr_iv_cond_doesnt_control_exit2(ptr %start, i16 %len) {
+; CHECK-LABEL: @test_monotonic_ptr_iv_cond_doesnt_control_exit2(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[UPPER:%.*]] = getelementptr inbounds i32, ptr [[START:%.*]], i16 [[LEN:%.*]]
+; CHECK-NEXT:    [[LEN_NEG:%.*]] = icmp slt i16 [[LEN]], 0
+; CHECK-NEXT:    br i1 [[LEN_NEG]], label [[EXIT:%.*]], label [[LOOP_PH:%.*]]
+; CHECK:       loop.ph:
+; CHECK-NEXT:    br label [[LOOP_HEADER:%.*]]
+; CHECK:       loop.header:
+; CHECK-NEXT:    [[PTR_IV:%.*]] = phi ptr [ [[START]], [[LOOP_PH]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ]
+; CHECK-NEXT:    [[C_1:%.*]] = icmp ne ptr [[PTR_IV]], [[UPPER]]
+; CHECK-NEXT:    br i1 [[C_1]], label [[THEN:%.*]], label [[FOR_BODY:%.*]]
+; CHECK:       for.body:
+; CHECK-NEXT:    [[C_0:%.*]] = call i1 @cond()
+; CHECK-NEXT:    br i1 [[C_0]], label [[EXIT]], label [[LOOP_LATCH]]
+; CHECK:       then:
+; CHECK-NEXT:    [[T_1:%.*]] = icmp uge ptr [[PTR_IV]], [[START]]
+; CHECK-NEXT:    [[T_2:%.*]] = icmp ult ptr [[PTR_IV]], [[UPPER]]
+; CHECK-NEXT:    [[AND:%.*]] = and i1 [[T_1]], [[T_2]]
+; CHECK-NEXT:    call void @use.i1(i1 [[AND]])
+; CHECK-NEXT:    br label [[LOOP_LATCH]]
+; CHECK:       loop.latch:
+; CHECK-NEXT:    call void @use(ptr [[PTR_IV]])
+; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, ptr [[PTR_IV]], i16 1
+; CHECK-NEXT:    br label [[LOOP_HEADER]]
+; CHECK:       exit:
+; CHECK-NEXT:    ret void
+;
+entry:
+  %upper = getelementptr inbounds i32, ptr %start, i16 %len
+  %len.neg = icmp slt i16 %len, 0
+  br i1 %len.neg, label %exit, label %loop.ph
+
+loop.ph:
+  br label %loop.header
+
+loop.header:
+  %ptr.iv = phi ptr [ %start, %loop.ph ], [ %ptr.iv.next, %loop.latch ]
+  %c.1 = icmp ne ptr %ptr.iv, %upper
+  br i1 %c.1, label %then, label %for.body
+
+for.body:
+  %c.0 = call i1 @cond()
+  br i1 %c.0, label %exit, label %loop.latch
+
+then:
+  %t.1 = icmp uge ptr %ptr.iv, %start
+  %t.2 = icmp ult ptr %ptr.iv, %upper
+  %and = and i1 %t.1, %t.2
+  call void @use.i1(i1 %and)
+  br label %loop.latch
+
+loop.latch:
+  call void @use(ptr %ptr.iv)
+  %ptr.iv.next = getelementptr inbounds i32, ptr %ptr.iv, i16 1
+  br label %loop.header
+
+exit:
+  ret void
+}
 
 define void @test_monotonic_ptr_iv_cond_doesnt_dominate_checks(ptr %start, i16 %len) {
 ; CHECK-LABEL: @test_monotonic_ptr_iv_cond_doesnt_dominate_checks(
@@ -1605,3 +1665,59 @@ then:
 exit.2:
   ret void
 }
+
+define void @test_monotonic_ptr_iv_inc_1_loop_exits_on_ne(ptr %start, i16 %len) {
+; CHECK-LABEL: @test_monotonic_ptr_iv_inc_1_loop_exits_on_ne(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[UPPER:%.*]] = getelementptr inbounds i32, ptr [[START:%.*]], i16 [[LEN:%.*]]
+; CHECK-NEXT:    [[LEN_NEG:%.*]] = icmp sge i16 [[LEN]], 0
+; CHECK-NEXT:    call void @llvm.assume(i1 [[LEN_NEG]])
+; CHECK-NEXT:    br label [[LOOP_PH:%.*]]
+; CHECK:       loop.ph:
+; CHECK-NEXT:    br label [[LOOP_HEADER:%.*]]
+; CHECK:       loop.header:
+; CHECK-NEXT:    [[PTR_IV:%.*]] = phi ptr [ [[START]], [[LOOP_PH]] ], [ [[PTR_IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ]
+; CHECK-NEXT:    [[C:%.*]] = icmp ne ptr [[PTR_IV]], [[UPPER]]
+; CHECK-NEXT:    br i1 [[C]], label [[EXIT:%.*]], label [[FOR_BODY:%.*]]
+; CHECK:       for.body:
+; CHECK-NEXT:    br label [[LOOP_LATCH]]
+; CHECK:       loop.latch:
+; CHECK-NEXT:    call void @use(ptr [[PTR_IV]])
+; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr inbounds i32, ptr [[PTR_IV]], i16 1
+; CHECK-NEXT:    br label [[LOOP_HEADER]]
+; CHECK:       exit:
+; CHECK-NEXT:    [[C_2:%.*]] = icmp uge ptr [[PTR_IV]], [[START]]
+; CHECK-NEXT:    [[C_3:%.*]] = icmp ult ptr [[PTR_IV]], [[UPPER]]
+; CHECK-NEXT:    [[AND:%.*]] = and i1 [[C_2]], [[C_3]]
+; CHECK-NEXT:    call void @use.i1(i1 [[AND]])
+; CHECK-NEXT:    ret void
+;
+entry:
+  %upper = getelementptr inbounds i32, ptr %start, i16 %len
+  %len.neg = icmp sge i16 %len, 0
+  call void @llvm.assume(i1 %len.neg)
+  br label %loop.ph
+
+loop.ph:
+  br label %loop.header
+
+loop.header:
+  %ptr.iv = phi ptr [ %start, %loop.ph ], [ %ptr.iv.next, %loop.latch ]
+  %c = icmp ne ptr %ptr.iv, %upper
+  br i1 %c, label %exit, label %for.body
+
+for.body:
+  br label %loop.latch
+
+loop.latch:
+  call void @use(ptr %ptr.iv)
+  %ptr.iv.next = getelementptr inbounds i32, ptr %ptr.iv, i16 1
+  br label %loop.header
+
+exit:
+  %c.2 = icmp uge ptr %ptr.iv, %start
+  %c.3 = icmp ult ptr %ptr.iv, %upper
+  %and = and i1 %c.2, %c.3
+  call void @use.i1(i1 %and)
+  ret void
+}