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[ConstraintElim] Add set of tests where a loop iv is used in exit.
Test cases inspired by #90417.
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llvm/test/Transforms/ConstraintElimination/induction-condition-in-loop-exit.ll
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| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5 | ||
| ; RUN: opt -p constraint-elimination -S %s | FileCheck %s | ||
|
|
||
| define i1 @multi_exiting_loop_eq_same_unique_exit_const_compare_known(ptr %s) { | ||
| ; CHECK-LABEL: define i1 @multi_exiting_loop_eq_same_unique_exit_const_compare_known( | ||
| ; CHECK-SAME: ptr [[S:%.*]]) { | ||
| ; CHECK-NEXT: [[ENTRY:.*]]: | ||
| ; CHECK-NEXT: br label %[[LOOP_HEADER:.*]] | ||
| ; CHECK: [[LOOP_HEADER]]: | ||
| ; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP_LATCH:.*]] ] | ||
| ; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i32 [[IV]], 1234 | ||
| ; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[EXIT:.*]], label %[[LOOP_LATCH]] | ||
| ; CHECK: [[LOOP_LATCH]]: | ||
| ; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i8, ptr [[S]], i32 [[IV]] | ||
| ; CHECK-NEXT: [[TMP0:%.*]] = load i8, ptr [[ARRAYIDX]], align 1 | ||
| ; CHECK-NEXT: [[LATCH_C:%.*]] = icmp ult i8 [[TMP0]], 10 | ||
| ; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i32 [[IV]], 1 | ||
| ; CHECK-NEXT: br i1 [[LATCH_C]], label %[[LOOP_HEADER]], label %[[EXIT]] | ||
| ; CHECK: [[EXIT]]: | ||
| ; CHECK-NEXT: [[T:%.*]] = icmp ult i32 [[IV]], 1235 | ||
| ; CHECK-NEXT: ret i1 [[T]] | ||
| ; | ||
| entry: | ||
| br label %loop.header | ||
|
|
||
| loop.header: | ||
| %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop.latch ] | ||
| %exitcond.not = icmp eq i32 %iv, 1234 | ||
| br i1 %exitcond.not, label %exit, label %loop.latch | ||
|
|
||
| loop.latch: | ||
| %arrayidx = getelementptr inbounds i8, ptr %s, i32 %iv | ||
| %0 = load i8, ptr %arrayidx, align 1 | ||
| %latch.c = icmp ult i8 %0, 10 | ||
| %iv.next = add nuw nsw i32 %iv, 1 | ||
| br i1 %latch.c, label %loop.header, label %exit | ||
|
|
||
| exit: | ||
| %t = icmp ult i32 %iv, 1235 | ||
| ret i1 %t | ||
| } | ||
|
|
||
| define i1 @multi_exiting_loop_eq_same_exit_with_out_loop_preds_const_compare_not_known(ptr %s, i1 %pre.c, i32 %x) { | ||
| ; CHECK-LABEL: define i1 @multi_exiting_loop_eq_same_exit_with_out_loop_preds_const_compare_not_known( | ||
| ; CHECK-SAME: ptr [[S:%.*]], i1 [[PRE_C:%.*]], i32 [[X:%.*]]) { | ||
| ; CHECK-NEXT: [[ENTRY:.*]]: | ||
| ; CHECK-NEXT: br i1 [[PRE_C]], label %[[LOOP_HEADER:.*]], label %[[EXIT:.*]] | ||
| ; CHECK: [[LOOP_HEADER]]: | ||
| ; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP_LATCH:.*]] ] | ||
| ; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i32 [[IV]], 1234 | ||
| ; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[EXIT]], label %[[LOOP_LATCH]] | ||
| ; CHECK: [[LOOP_LATCH]]: | ||
| ; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i8, ptr [[S]], i32 [[IV]] | ||
| ; CHECK-NEXT: [[TMP0:%.*]] = load i8, ptr [[ARRAYIDX]], align 1 | ||
| ; CHECK-NEXT: [[LATCH_C:%.*]] = icmp ult i8 [[TMP0]], 10 | ||
| ; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i32 [[IV]], 1 | ||
| ; CHECK-NEXT: br i1 [[LATCH_C]], label %[[LOOP_HEADER]], label %[[EXIT]] | ||
| ; CHECK: [[EXIT]]: | ||
| ; CHECK-NEXT: [[P:%.*]] = phi i32 [ [[X]], %[[ENTRY]] ], [ [[IV]], %[[LOOP_HEADER]] ], [ [[IV]], %[[LOOP_LATCH]] ] | ||
| ; CHECK-NEXT: [[U:%.*]] = icmp ult i32 [[P]], 1235 | ||
| ; CHECK-NEXT: ret i1 [[U]] | ||
| ; | ||
| entry: | ||
| br i1 %pre.c, label %loop.header, label %exit | ||
|
|
||
| loop.header: | ||
| %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop.latch ] | ||
| %exitcond.not = icmp eq i32 %iv, 1234 | ||
| br i1 %exitcond.not, label %exit, label %loop.latch | ||
|
|
||
| loop.latch: | ||
| %arrayidx = getelementptr inbounds i8, ptr %s, i32 %iv | ||
| %0 = load i8, ptr %arrayidx, align 1 | ||
| %latch.c = icmp ult i8 %0, 10 | ||
| %iv.next = add nuw nsw i32 %iv, 1 | ||
| br i1 %latch.c, label %loop.header, label %exit | ||
|
|
||
| exit: | ||
| %p = phi i32 [ %x, %entry ], [ %iv, %loop.header ], [ %iv, %loop.latch ] | ||
| %u = icmp ult i32 %p, 1235 | ||
| ret i1 %u | ||
| } | ||
|
|
||
| define i1 @multi_exiting_loop_eq_same_unique_exit_successors_swapped(ptr %s) { | ||
| ; CHECK-LABEL: define i1 @multi_exiting_loop_eq_same_unique_exit_successors_swapped( | ||
| ; CHECK-SAME: ptr [[S:%.*]]) { | ||
| ; CHECK-NEXT: [[ENTRY:.*]]: | ||
| ; CHECK-NEXT: br label %[[LOOP_HEADER:.*]] | ||
| ; CHECK: [[LOOP_HEADER]]: | ||
| ; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP_LATCH:.*]] ] | ||
| ; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i32 [[IV]], 1234 | ||
| ; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[LOOP_LATCH]], label %[[EXIT:.*]] | ||
| ; CHECK: [[LOOP_LATCH]]: | ||
| ; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i8, ptr [[S]], i32 [[IV]] | ||
| ; CHECK-NEXT: [[TMP0:%.*]] = load i8, ptr [[ARRAYIDX]], align 1 | ||
| ; CHECK-NEXT: [[LATCH_C:%.*]] = icmp ult i8 [[TMP0]], 10 | ||
| ; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i32 [[IV]], 1 | ||
| ; CHECK-NEXT: br i1 [[LATCH_C]], label %[[LOOP_HEADER]], label %[[EXIT]] | ||
| ; CHECK: [[EXIT]]: | ||
| ; CHECK-NEXT: [[U:%.*]] = icmp ult i32 [[IV]], 1235 | ||
| ; CHECK-NEXT: ret i1 [[U]] | ||
| ; | ||
| entry: | ||
| br label %loop.header | ||
|
|
||
| loop.header: | ||
| %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop.latch ] | ||
| %exitcond.not = icmp eq i32 %iv, 1234 | ||
| br i1 %exitcond.not, label %loop.latch, label %exit | ||
|
|
||
| loop.latch: | ||
| %arrayidx = getelementptr inbounds i8, ptr %s, i32 %iv | ||
| %0 = load i8, ptr %arrayidx, align 1 | ||
| %latch.c = icmp ult i8 %0, 10 | ||
| %iv.next = add nuw nsw i32 %iv, 1 | ||
| br i1 %latch.c, label %loop.header, label %exit | ||
|
|
||
| exit: | ||
| %u = icmp ult i32 %iv, 1235 | ||
| ret i1 %u | ||
| } | ||
|
|
||
| define i1 @multi_exiting_loop_eq_same_unique_exit_const_compare_not_known(ptr %s) { | ||
| ; CHECK-LABEL: define i1 @multi_exiting_loop_eq_same_unique_exit_const_compare_not_known( | ||
| ; CHECK-SAME: ptr [[S:%.*]]) { | ||
| ; CHECK-NEXT: [[ENTRY:.*]]: | ||
| ; CHECK-NEXT: br label %[[LOOP_HEADER:.*]] | ||
| ; CHECK: [[LOOP_HEADER]]: | ||
| ; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP_LATCH:.*]] ] | ||
| ; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i32 [[IV]], 1234 | ||
| ; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[EXIT:.*]], label %[[LOOP_LATCH]] | ||
| ; CHECK: [[LOOP_LATCH]]: | ||
| ; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i8, ptr [[S]], i32 [[IV]] | ||
| ; CHECK-NEXT: [[TMP0:%.*]] = load i8, ptr [[ARRAYIDX]], align 1 | ||
| ; CHECK-NEXT: [[LATCH_C:%.*]] = icmp ult i8 [[TMP0]], 10 | ||
| ; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i32 [[IV]], 1 | ||
| ; CHECK-NEXT: br i1 [[LATCH_C]], label %[[LOOP_HEADER]], label %[[EXIT]] | ||
| ; CHECK: [[EXIT]]: | ||
| ; CHECK-NEXT: [[U:%.*]] = icmp ult i32 [[IV]], 1234 | ||
| ; CHECK-NEXT: ret i1 [[U]] | ||
| ; | ||
| entry: | ||
| br label %loop.header | ||
|
|
||
| loop.header: | ||
| %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop.latch ] | ||
| %exitcond.not = icmp eq i32 %iv, 1234 | ||
| br i1 %exitcond.not, label %exit, label %loop.latch | ||
|
|
||
| loop.latch: | ||
| %arrayidx = getelementptr inbounds i8, ptr %s, i32 %iv | ||
| %0 = load i8, ptr %arrayidx, align 1 | ||
| %latch.c = icmp ult i8 %0, 10 | ||
| %iv.next = add nuw nsw i32 %iv, 1 | ||
| br i1 %latch.c, label %loop.header, label %exit | ||
|
|
||
| exit: | ||
| %u = icmp ult i32 %iv, 1234 | ||
| ret i1 %u | ||
| } | ||
|
|
||
| define i1 @multi_exiting_loop_eq_same_unique_exit_var_compare_known(ptr %s, i32 %N) { | ||
| ; CHECK-LABEL: define i1 @multi_exiting_loop_eq_same_unique_exit_var_compare_known( | ||
| ; CHECK-SAME: ptr [[S:%.*]], i32 [[N:%.*]]) { | ||
| ; CHECK-NEXT: [[ENTRY:.*]]: | ||
| ; CHECK-NEXT: br label %[[LOOP_HEADER:.*]] | ||
| ; CHECK: [[LOOP_HEADER]]: | ||
| ; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP_LATCH:.*]] ] | ||
| ; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i32 [[IV]], [[N]] | ||
| ; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[EXIT:.*]], label %[[LOOP_LATCH]] | ||
| ; CHECK: [[LOOP_LATCH]]: | ||
| ; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i8, ptr [[S]], i32 [[IV]] | ||
| ; CHECK-NEXT: [[TMP0:%.*]] = load i8, ptr [[ARRAYIDX]], align 1 | ||
| ; CHECK-NEXT: [[LATCH_C:%.*]] = icmp ult i8 [[TMP0]], 10 | ||
| ; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i32 [[IV]], 1 | ||
| ; CHECK-NEXT: br i1 [[LATCH_C]], label %[[LOOP_HEADER]], label %[[EXIT]] | ||
| ; CHECK: [[EXIT]]: | ||
| ; CHECK-NEXT: [[T:%.*]] = icmp ule i32 [[IV]], [[N]] | ||
| ; CHECK-NEXT: ret i1 [[T]] | ||
| ; | ||
| entry: | ||
| br label %loop.header | ||
|
|
||
| loop.header: | ||
| %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop.latch ] | ||
| %exitcond.not = icmp eq i32 %iv, %N | ||
| br i1 %exitcond.not, label %exit, label %loop.latch | ||
|
|
||
| loop.latch: | ||
| %arrayidx = getelementptr inbounds i8, ptr %s, i32 %iv | ||
| %0 = load i8, ptr %arrayidx, align 1 | ||
| %latch.c = icmp ult i8 %0, 10 | ||
| %iv.next = add nuw nsw i32 %iv, 1 | ||
| br i1 %latch.c, label %loop.header, label %exit | ||
|
|
||
| exit: | ||
| %t = icmp ule i32 %iv, %N | ||
| ret i1 %t | ||
| } | ||
|
|
||
| define i1 @multi_exiting_loop_ne_same_unique_exit_const_compare_known(ptr %s) { | ||
| ; CHECK-LABEL: define i1 @multi_exiting_loop_ne_same_unique_exit_const_compare_known( | ||
| ; CHECK-SAME: ptr [[S:%.*]]) { | ||
| ; CHECK-NEXT: [[ENTRY:.*]]: | ||
| ; CHECK-NEXT: br label %[[LOOP_HEADER:.*]] | ||
| ; CHECK: [[LOOP_HEADER]]: | ||
| ; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP_LATCH:.*]] ] | ||
| ; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp ne i32 [[IV]], 1234 | ||
| ; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[LOOP_LATCH]], label %[[EXIT:.*]] | ||
| ; CHECK: [[LOOP_LATCH]]: | ||
| ; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i8, ptr [[S]], i32 [[IV]] | ||
| ; CHECK-NEXT: [[TMP0:%.*]] = load i8, ptr [[ARRAYIDX]], align 1 | ||
| ; CHECK-NEXT: [[LATCH_C:%.*]] = icmp ult i8 [[TMP0]], 10 | ||
| ; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i32 [[IV]], 1 | ||
| ; CHECK-NEXT: br i1 [[LATCH_C]], label %[[LOOP_HEADER]], label %[[EXIT]] | ||
| ; CHECK: [[EXIT]]: | ||
| ; CHECK-NEXT: [[T:%.*]] = icmp ult i32 [[IV]], 1235 | ||
| ; CHECK-NEXT: ret i1 [[T]] | ||
| ; | ||
| entry: | ||
| br label %loop.header | ||
|
|
||
| loop.header: | ||
| %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop.latch ] | ||
| %exitcond.not = icmp ne i32 %iv, 1234 | ||
| br i1 %exitcond.not, label %loop.latch, label %exit | ||
|
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||
| loop.latch: | ||
| %arrayidx = getelementptr inbounds i8, ptr %s, i32 %iv | ||
| %0 = load i8, ptr %arrayidx, align 1 | ||
| %latch.c = icmp ult i8 %0, 10 | ||
| %iv.next = add nuw nsw i32 %iv, 1 | ||
| br i1 %latch.c, label %loop.header, label %exit | ||
|
|
||
| exit: | ||
| %t = icmp ult i32 %iv, 1235 | ||
| ret i1 %t | ||
| } | ||
|
|
||
| define i1 @multi_exiting_loop_ne_same_unique_exit_successors_swapped(ptr %s) { | ||
| ; CHECK-LABEL: define i1 @multi_exiting_loop_ne_same_unique_exit_successors_swapped( | ||
| ; CHECK-SAME: ptr [[S:%.*]]) { | ||
| ; CHECK-NEXT: [[ENTRY:.*]]: | ||
| ; CHECK-NEXT: br label %[[LOOP_HEADER:.*]] | ||
| ; CHECK: [[LOOP_HEADER]]: | ||
| ; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP_LATCH:.*]] ] | ||
| ; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp ne i32 [[IV]], 1234 | ||
| ; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[EXIT:.*]], label %[[LOOP_LATCH]] | ||
| ; CHECK: [[LOOP_LATCH]]: | ||
| ; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i8, ptr [[S]], i32 [[IV]] | ||
| ; CHECK-NEXT: [[TMP0:%.*]] = load i8, ptr [[ARRAYIDX]], align 1 | ||
| ; CHECK-NEXT: [[LATCH_C:%.*]] = icmp ult i8 [[TMP0]], 10 | ||
| ; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i32 [[IV]], 1 | ||
| ; CHECK-NEXT: br i1 [[LATCH_C]], label %[[LOOP_HEADER]], label %[[EXIT]] | ||
| ; CHECK: [[EXIT]]: | ||
| ; CHECK-NEXT: [[U:%.*]] = icmp ult i32 [[IV]], 1235 | ||
| ; CHECK-NEXT: ret i1 [[U]] | ||
| ; | ||
| entry: | ||
| br label %loop.header | ||
|
|
||
| loop.header: | ||
| %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop.latch ] | ||
| %exitcond.not = icmp ne i32 %iv, 1234 | ||
| br i1 %exitcond.not, label %exit, label %loop.latch | ||
|
|
||
| loop.latch: | ||
| %arrayidx = getelementptr inbounds i8, ptr %s, i32 %iv | ||
| %0 = load i8, ptr %arrayidx, align 1 | ||
| %latch.c = icmp ult i8 %0, 10 | ||
| %iv.next = add nuw nsw i32 %iv, 1 | ||
| br i1 %latch.c, label %loop.header, label %exit | ||
|
|
||
| exit: | ||
| %u = icmp ult i32 %iv, 1235 | ||
| ret i1 %u | ||
| } |