[llvm] e25eb14 - [ConstraintElim] Add tests for loops with chained header conditions.
Florian Hahn via llvm-commits
llvm-commits at lists.llvm.org
Mon Sep 9 06:13:12 PDT 2024
Author: Florian Hahn
Date: 2024-09-09T14:04:17+01:00
New Revision: e25eb1433110d94d16fd69e5aca9bdf72259263d
URL: https://github.com/llvm/llvm-project/commit/e25eb1433110d94d16fd69e5aca9bdf72259263d
DIFF: https://github.com/llvm/llvm-project/commit/e25eb1433110d94d16fd69e5aca9bdf72259263d.diff
LOG: [ConstraintElim] Add tests for loops with chained header conditions.
Added:
llvm/test/Transforms/ConstraintElimination/monotonic-pointer-phis-chain-of-exits.ll
Modified:
Removed:
################################################################################
diff --git a/llvm/test/Transforms/ConstraintElimination/monotonic-pointer-phis-chain-of-exits.ll b/llvm/test/Transforms/ConstraintElimination/monotonic-pointer-phis-chain-of-exits.ll
new file mode 100644
index 00000000000000..1eaabe8b3d24f8
--- /dev/null
+++ b/llvm/test/Transforms/ConstraintElimination/monotonic-pointer-phis-chain-of-exits.ll
@@ -0,0 +1,274 @@
+; 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 i1 @cond()
+
+define void @test_monotonic_ptr_iv_inc_1_
diff erent_element_types_1_chain_of_2_exit_condition_unrelated_condition_in_header(ptr %start, i16 %len, i16 %x) {
+; CHECK-LABEL: @test_monotonic_ptr_iv_inc_1_
diff erent_element_types_1_chain_of_2_exit_condition_unrelated_condition_in_header(
+; 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_0:%.*]] = icmp eq i16 [[X:%.*]], 1
+; CHECK-NEXT: br i1 [[C_0]], label [[EXIT]], label [[THEN:%.*]]
+; CHECK: then:
+; CHECK-NEXT: [[C_1:%.*]] = icmp eq ptr [[PTR_IV]], [[UPPER]]
+; CHECK-NEXT: br i1 [[C_1]], label [[EXIT]], label [[FOR_BODY:%.*]]
+; CHECK: for.body:
+; CHECK-NEXT: [[C_2:%.*]] = call i1 @cond()
+; CHECK-NEXT: br i1 [[C_2]], 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 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.0 = icmp eq i16 %x, 1
+ br i1 %c.0, label %exit, label %then
+
+then:
+ %c.1 = icmp eq ptr %ptr.iv, %upper
+ br i1 %c.1, label %exit, label %for.body
+
+for.body:
+ %c.2 = call i1 @cond()
+ br i1 %c.2, 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 i8, ptr %ptr.iv, i16 1
+ br label %loop.header
+
+exit:
+ ret void
+}
+
+define void @test_monotonic_ptr_iv_inc_1_
diff erent_element_types_1_chain_of_3_exit_condition_unrelated_condition_in_header(ptr %start, i16 %len, i16 %x) {
+; CHECK-LABEL: @test_monotonic_ptr_iv_inc_1_
diff erent_element_types_1_chain_of_3_exit_condition_unrelated_condition_in_header(
+; 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_0:%.*]] = icmp eq i16 [[X:%.*]], 1
+; CHECK-NEXT: br i1 [[C_0]], label [[EXIT]], label [[THEN_1:%.*]]
+; CHECK: then.1:
+; CHECK-NEXT: [[C_00:%.*]] = icmp ult i16 [[X]], 100
+; CHECK-NEXT: br i1 [[C_0]], label [[EXIT]], label [[THEN_2:%.*]]
+; CHECK: then.2:
+; CHECK-NEXT: [[C_1:%.*]] = icmp eq ptr [[PTR_IV]], [[UPPER]]
+; CHECK-NEXT: br i1 [[C_1]], label [[EXIT]], label [[FOR_BODY:%.*]]
+; CHECK: for.body:
+; CHECK-NEXT: [[C_2:%.*]] = call i1 @cond()
+; CHECK-NEXT: br i1 [[C_2]], 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 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.0 = icmp eq i16 %x, 1
+ br i1 %c.0, label %exit, label %then.1
+
+then.1:
+ %c.00 = icmp ult i16 %x, 100
+ br i1 %c.0, label %exit, label %then.2
+
+then.2:
+ %c.1 = icmp eq ptr %ptr.iv, %upper
+ br i1 %c.1, label %exit, label %for.body
+
+for.body:
+ %c.2 = call i1 @cond()
+ br i1 %c.2, 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 i8, ptr %ptr.iv, i16 1
+ br label %loop.header
+
+exit:
+ ret void
+}
+
+define void @test_monotonic_ptr_iv_inc_1_
diff erent_element_types_1_chain_of_2_exit_conditions_with_slt_in_header(ptr %start, i16 %len, i16 %x) {
+; CHECK-LABEL: @test_monotonic_ptr_iv_inc_1_
diff erent_element_types_1_chain_of_2_exit_conditions_with_slt_in_header(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[UPPER:%.*]] = getelementptr inbounds i32, ptr [[START:%.*]], i16 [[LEN:%.*]]
+; 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: [[LEN_NEG:%.*]] = icmp slt i16 [[LEN]], 0
+; CHECK-NEXT: br i1 [[LEN_NEG]], label [[EXIT:%.*]], label [[THEN:%.*]]
+; CHECK: then:
+; CHECK-NEXT: [[C_1:%.*]] = icmp eq ptr [[PTR_IV]], [[UPPER]]
+; CHECK-NEXT: br i1 [[C_1]], label [[EXIT]], label [[FOR_BODY:%.*]]
+; CHECK: for.body:
+; CHECK-NEXT: [[C_2:%.*]] = call i1 @cond()
+; CHECK-NEXT: br i1 [[C_2]], 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 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
+ br label %loop.ph
+
+loop.ph:
+ br label %loop.header
+
+loop.header:
+ %ptr.iv = phi ptr [ %start, %loop.ph ], [ %ptr.iv.next, %loop.latch ]
+ %len.neg = icmp slt i16 %len, 0
+ br i1 %len.neg, label %exit, label %then
+
+then:
+ %c.1 = icmp eq ptr %ptr.iv, %upper
+ br i1 %c.1, label %exit, label %for.body
+
+for.body:
+ %c.2 = call i1 @cond()
+ br i1 %c.2, 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 i8, ptr %ptr.iv, i16 1
+ br label %loop.header
+
+exit:
+ ret void
+}
+
+define void @test_header_not_exiting(ptr %start, i16 %len, i16 %x) {
+; CHECK-LABEL: @test_header_not_exiting(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[UPPER:%.*]] = getelementptr inbounds i32, ptr [[START:%.*]], i16 [[LEN:%.*]]
+; 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: [[LEN_NEG:%.*]] = icmp slt i16 [[LEN]], 0
+; CHECK-NEXT: br i1 [[LEN_NEG]], label [[THEN:%.*]], label [[FOR_BODY:%.*]]
+; CHECK: then:
+; CHECK-NEXT: [[C_1:%.*]] = icmp eq ptr [[PTR_IV]], [[UPPER]]
+; CHECK-NEXT: br i1 [[C_1]], label [[EXIT:%.*]], label [[FOR_BODY]]
+; CHECK: for.body:
+; CHECK-NEXT: [[C_2:%.*]] = call i1 @cond()
+; CHECK-NEXT: br i1 [[C_2]], 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 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
+ br label %loop.ph
+
+loop.ph:
+ br label %loop.header
+
+loop.header:
+ %ptr.iv = phi ptr [ %start, %loop.ph ], [ %ptr.iv.next, %loop.latch ]
+ %len.neg = icmp slt i16 %len, 0
+ br i1 %len.neg, label %then, label %for.body
+
+then:
+ %c.1 = icmp eq ptr %ptr.iv, %upper
+ br i1 %c.1, label %exit, label %for.body
+
+for.body:
+ %c.2 = call i1 @cond()
+ br i1 %c.2, 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 i8, ptr %ptr.iv, i16 1
+ br label %loop.header
+
+exit:
+ ret void
+}
More information about the llvm-commits
mailing list