[LoopPeel] Add tests for peeling from end with variable trip counts.
Add more test coverage for peeling the last iteration with variable trip counts. Separate test cases for constant and variable trip counts in different files.
This commit is contained in:
Florian Hahn
parent
1b6b036c02
commit
705e27c234
@ -397,45 +397,6 @@ exit:
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ret i64 %iv
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}
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define i64 @peel_single_block_loop_iv_step_1_may_execute_only_once(i64 %n) {
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; CHECK-LABEL: define i64 @peel_single_block_loop_iv_step_1_may_execute_only_once(
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; CHECK-SAME: i64 [[N:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*]]:
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; CHECK-NEXT: [[N_NOT_0:%.*]] = icmp ne i64 [[N]], 0
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; CHECK-NEXT: call void @llvm.assume(i1 [[N_NOT_0]])
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; CHECK-NEXT: [[SUB:%.*]] = add nsw i64 [[N]], 1
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; CHECK-NEXT: br label %[[LOOP:.*]]
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; CHECK: [[LOOP]]:
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; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
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; CHECK-NEXT: [[CMP18_NOT:%.*]] = icmp eq i64 [[IV]], [[N]]
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; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP18_NOT]], i32 10, i32 20
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; CHECK-NEXT: call void @foo(i32 [[COND]])
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; CHECK-NEXT: [[IV_NEXT]] = add i64 [[IV]], 1
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; CHECK-NEXT: [[EC:%.*]] = icmp ne i64 [[IV_NEXT]], [[N]]
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; CHECK-NEXT: br i1 [[EC]], label %[[LOOP]], label %[[EXIT:.*]]
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; CHECK: [[EXIT]]:
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; CHECK-NEXT: [[IV_LCSSA:%.*]] = phi i64 [ [[IV]], %[[LOOP]] ]
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; CHECK-NEXT: ret i64 [[IV_LCSSA]]
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;
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entry:
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%n.not.0 = icmp ne i64 %n, 0
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call void @llvm.assume(i1 %n.not.0)
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%sub = add nsw i64 %n, 1
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br label %loop
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loop:
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%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
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%cmp = icmp eq i64 %iv, %n
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%cond = select i1 %cmp, i32 10, i32 20
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call void @foo(i32 %cond)
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%iv.next = add i64 %iv, 1
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%ec = icmp ne i64 %iv.next, %n
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br i1 %ec, label %loop, label %exit
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exit:
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ret i64 %iv
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}
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define i64 @peel_single_block_loop_iv_step_neg_1() {
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; CHECK-LABEL: define i64 @peel_single_block_loop_iv_step_neg_1() {
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; CHECK-NEXT: [[ENTRY:.*]]:
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@ -0,0 +1,199 @@
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
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; RUN: opt -p loop-unroll -unroll-full-max-count=0 -S %s | FileCheck %s
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declare void @foo(i32)
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define i32 @peel_last_with_trip_count_check_lcssa_phi(i32 %n) {
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; CHECK-LABEL: define i32 @peel_last_with_trip_count_check_lcssa_phi(
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; CHECK-SAME: i32 [[N:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*]]:
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; CHECK-NEXT: [[SUB:%.*]] = add i32 [[N]], -1
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; CHECK-NEXT: br label %[[LOOP:.*]]
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; CHECK: [[LOOP]]:
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; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
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; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[IV]], [[SUB]]
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[C]], i32 1, i32 2
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; CHECK-NEXT: call void @foo(i32 [[SEL]])
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; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 1
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; CHECK-NEXT: [[EC:%.*]] = icmp ne i32 [[IV_NEXT]], [[N]]
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; CHECK-NEXT: br i1 [[EC]], label %[[LOOP]], label %[[EXIT:.*]]
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; CHECK: [[EXIT]]:
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; CHECK-NEXT: [[SEL_LCSSA:%.*]] = phi i32 [ [[SEL]], %[[LOOP]] ]
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; CHECK-NEXT: ret i32 [[SEL_LCSSA]]
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;
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entry:
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%sub = add i32 %n, -1
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br label %loop
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loop:
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%iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
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%c = icmp eq i32 %iv, %sub
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%sel = select i1 %c, i32 1, i32 2
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call void @foo(i32 %sel)
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%iv.next = add i32 %iv, 1
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%ec = icmp ne i32 %iv.next, %n
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br i1 %ec, label %loop, label %exit
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exit:
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%sel.lcssa = phi i32 [ %sel, %loop ]
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ret i32 %sel.lcssa
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}
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define i32 @peel_last_with_trip_count_check_lcssa_phi_step_2(i32 %n) {
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; CHECK-LABEL: define i32 @peel_last_with_trip_count_check_lcssa_phi_step_2(
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; CHECK-SAME: i32 [[N:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*]]:
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; CHECK-NEXT: [[SUB:%.*]] = add i32 [[N]], -2
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; CHECK-NEXT: br label %[[LOOP:.*]]
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; CHECK: [[LOOP]]:
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; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
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; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[IV]], [[SUB]]
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[C]], i32 1, i32 2
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; CHECK-NEXT: call void @foo(i32 [[SEL]])
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; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 2
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; CHECK-NEXT: [[EC:%.*]] = icmp ne i32 [[IV_NEXT]], [[N]]
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; CHECK-NEXT: br i1 [[EC]], label %[[LOOP]], label %[[EXIT:.*]]
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; CHECK: [[EXIT]]:
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; CHECK-NEXT: [[SEL_LCSSA:%.*]] = phi i32 [ [[SEL]], %[[LOOP]] ]
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; CHECK-NEXT: ret i32 [[SEL_LCSSA]]
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;
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entry:
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%sub = add i32 %n, -2
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br label %loop
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loop:
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%iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
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%c = icmp eq i32 %iv, %sub
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%sel = select i1 %c, i32 1, i32 2
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call void @foo(i32 %sel)
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%iv.next = add i32 %iv, 2
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%ec = icmp ne i32 %iv.next, %n
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br i1 %ec, label %loop, label %exit
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exit:
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%sel.lcssa = phi i32 [ %sel, %loop ]
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ret i32 %sel.lcssa
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}
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define i64 @peel_single_block_loop_iv_step_1_may_execute_only_once(i64 %n) {
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; CHECK-LABEL: define i64 @peel_single_block_loop_iv_step_1_may_execute_only_once(
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; CHECK-SAME: i64 [[N:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*]]:
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; CHECK-NEXT: [[N_NOT_0:%.*]] = icmp ne i64 [[N]], 0
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; CHECK-NEXT: call void @llvm.assume(i1 [[N_NOT_0]])
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; CHECK-NEXT: [[SUB:%.*]] = add nsw i64 [[N]], 1
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; CHECK-NEXT: br label %[[LOOP:.*]]
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; CHECK: [[LOOP]]:
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; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
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; CHECK-NEXT: [[CMP18_NOT:%.*]] = icmp eq i64 [[IV]], [[N]]
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; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP18_NOT]], i32 10, i32 20
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; CHECK-NEXT: call void @foo(i32 [[COND]])
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; CHECK-NEXT: [[IV_NEXT]] = add i64 [[IV]], 1
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; CHECK-NEXT: [[EC:%.*]] = icmp ne i64 [[IV_NEXT]], [[N]]
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; CHECK-NEXT: br i1 [[EC]], label %[[LOOP]], label %[[EXIT:.*]]
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; CHECK: [[EXIT]]:
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; CHECK-NEXT: [[IV_LCSSA:%.*]] = phi i64 [ [[IV]], %[[LOOP]] ]
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; CHECK-NEXT: ret i64 [[IV_LCSSA]]
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;
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entry:
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%n.not.0 = icmp ne i64 %n, 0
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call void @llvm.assume(i1 %n.not.0)
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%sub = add nsw i64 %n, 1
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br label %loop
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loop:
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%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
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%cmp = icmp eq i64 %iv, %n
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%cond = select i1 %cmp, i32 10, i32 20
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call void @foo(i32 %cond)
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%iv.next = add i64 %iv, 1
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%ec = icmp ne i64 %iv.next, %n
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br i1 %ec, label %loop, label %exit
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exit:
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ret i64 %iv
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}
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define i32 @peel_last_with_trip_count_check_lcssa_phi_cmp_not_invar(i32 %n) {
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; CHECK-LABEL: define i32 @peel_last_with_trip_count_check_lcssa_phi_cmp_not_invar(
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; CHECK-SAME: i32 [[N:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*]]:
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; CHECK-NEXT: [[SUB:%.*]] = add i32 [[N]], -2
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; CHECK-NEXT: br label %[[LOOP:.*]]
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; CHECK: [[LOOP]]:
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; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
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; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[IV]], [[SUB]]
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[C]], i32 1, i32 2
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; CHECK-NEXT: call void @foo(i32 [[SEL]])
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; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 1
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; CHECK-NEXT: [[EC:%.*]] = icmp ne i32 [[IV_NEXT]], [[N]]
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; CHECK-NEXT: br i1 [[EC]], label %[[LOOP]], label %[[EXIT:.*]]
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; CHECK: [[EXIT]]:
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; CHECK-NEXT: [[SEL_LCSSA:%.*]] = phi i32 [ [[SEL]], %[[LOOP]] ]
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; CHECK-NEXT: ret i32 [[SEL_LCSSA]]
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;
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entry:
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%sub = add i32 %n, -2
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br label %loop
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loop:
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%iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
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%c = icmp eq i32 %iv, %sub
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%sel = select i1 %c, i32 1, i32 2
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call void @foo(i32 %sel)
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%iv.next = add i32 %iv, 1
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%ec = icmp ne i32 %iv.next, %n
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br i1 %ec, label %loop, label %exit
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exit:
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%sel.lcssa = phi i32 [ %sel, %loop ]
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ret i32 %sel.lcssa
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}
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define void @peel_last_with_trip_count_check_nested_loop(i32 %n) {
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; CHECK-LABEL: define void @peel_last_with_trip_count_check_nested_loop(
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; CHECK-SAME: i32 [[N:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: [[SUB:%.*]] = add i32 [[N]], -1
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; CHECK-NEXT: br label %[[OUTER_HEADER:.*]]
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; CHECK: [[OUTER_HEADER_LOOPEXIT:.*]]:
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; CHECK-NEXT: br label %[[OUTER_HEADER]]
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; CHECK: [[OUTER_HEADER]]:
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; CHECK-NEXT: br label %[[INNER_HEADER:.*]]
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; CHECK: [[INNER_HEADER]]:
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; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, %[[OUTER_HEADER]] ], [ [[IV_NEXT:%.*]], %[[INNER_LATCH:.*]] ]
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; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[IV]], [[SUB]]
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; CHECK-NEXT: br i1 [[C]], label %[[INNER_LATCH]], label %[[THEN:.*]]
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; CHECK: [[THEN]]:
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; CHECK-NEXT: call void @foo(i32 1)
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; CHECK-NEXT: br label %[[INNER_LATCH]]
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; CHECK: [[INNER_LATCH]]:
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; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 1
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; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i32 [[IV_NEXT]], [[N]]
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; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[OUTER_HEADER_LOOPEXIT]], label %[[INNER_HEADER]]
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;
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entry:
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%sub = add i32 %n, -1
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br label %outer.header
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outer.header:
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br label %inner.header
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inner.header:
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%iv = phi i32 [ 0, %outer.header ], [ %iv.next, %inner.latch ]
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%c = icmp eq i32 %iv, %sub
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br i1 %c, label %inner.latch, label %then
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then:
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call void @foo(i32 1)
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br label %inner.latch
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inner.latch:
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%iv.next = add i32 %iv, 1
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%exitcond.not = icmp eq i32 %iv.next, %n
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br i1 %exitcond.not, label %outer.header, label %inner.header
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}
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