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68b7cba2b0
Fixes the case where subsequent passes were unable to find and delete the invariant loop left over by the strlen idiom conversion. Since `loop-deletion` only operate on computable loops, we can update the loop condition to something more easily picked up by `loop-deletion` As pointed out in https://github.com/llvm/llvm-project/issues/134736
135 lines
6.5 KiB
LLVM
135 lines
6.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
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; RUN: opt -passes='loop(loop-idiom)' < %s -S | FileCheck %s
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define i64 @valid_wcslen32(ptr %src) {
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; CHECK-LABEL: define i64 @valid_wcslen32(
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; CHECK-SAME: ptr [[SRC:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*]]:
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq ptr [[SRC]], null
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; CHECK-NEXT: br i1 [[CMP]], label %[[RETURN:.*]], label %[[LOR_LHS_FALSE:.*]]
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; CHECK: [[LOR_LHS_FALSE]]:
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; CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr [[SRC]], align 4
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; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i32 [[TMP0]], 0
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; CHECK-NEXT: br i1 [[CMP1]], label %[[RETURN]], label %[[WHILE_COND_PREHEADER:.*]]
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; CHECK: [[WHILE_COND_PREHEADER]]:
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; CHECK-NEXT: [[NEWGEP:%.*]] = getelementptr i8, ptr [[SRC]], i64 4
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; CHECK-NEXT: [[WCSLEN:%.*]] = call i64 @wcslen(ptr [[NEWGEP]])
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; CHECK-NEXT: [[TMP1:%.*]] = shl i64 [[WCSLEN]], 2
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; CHECK-NEXT: [[TMP2:%.*]] = add i64 [[TMP1]], 4
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; CHECK-NEXT: [[END:%.*]] = getelementptr i8, ptr [[SRC]], i64 [[TMP2]]
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; CHECK-NEXT: br label %[[WHILE_COND:.*]]
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; CHECK: [[WHILE_COND]]:
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; CHECK-NEXT: [[SRC_PN:%.*]] = phi ptr [ [[CURR_0:%.*]], %[[WHILE_COND]] ], [ [[SRC]], %[[WHILE_COND_PREHEADER]] ]
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; CHECK-NEXT: [[CURR_0]] = getelementptr inbounds i8, ptr [[SRC_PN]], i64 4
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; CHECK-NEXT: [[TMP3:%.*]] = load i32, ptr [[CURR_0]], align 4
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; CHECK-NEXT: [[TOBOOL_NOT:%.*]] = icmp eq i32 [[TMP3]], 0
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; CHECK-NEXT: br i1 true, label %[[WHILE_END:.*]], label %[[WHILE_COND]]
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; CHECK: [[WHILE_END]]:
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; CHECK-NEXT: [[SUB_PTR_LHS_CAST:%.*]] = ptrtoint ptr [[END]] to i64
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; CHECK-NEXT: [[SUB_PTR_RHS_CAST:%.*]] = ptrtoint ptr [[SRC]] to i64
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; CHECK-NEXT: [[SUB_PTR_SUB:%.*]] = sub i64 [[SUB_PTR_LHS_CAST]], [[SUB_PTR_RHS_CAST]]
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; CHECK-NEXT: [[SUB_PTR_DIV:%.*]] = ashr exact i64 [[SUB_PTR_SUB]], 2
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; CHECK-NEXT: br label %[[RETURN]]
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; CHECK: [[RETURN]]:
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; CHECK-NEXT: [[RETVAL_0:%.*]] = phi i64 [ [[SUB_PTR_DIV]], %[[WHILE_END]] ], [ 0, %[[LOR_LHS_FALSE]] ], [ 0, %[[ENTRY]] ]
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; CHECK-NEXT: ret i64 [[RETVAL_0]]
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;
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entry:
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%cmp = icmp eq ptr %src, null
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br i1 %cmp, label %return, label %lor.lhs.false
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lor.lhs.false: ; preds = %entry
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%0 = load i32, ptr %src, align 4
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%cmp1 = icmp eq i32 %0, 0
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br i1 %cmp1, label %return, label %while.cond.preheader
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while.cond.preheader: ; preds = %lor.lhs.false
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br label %while.cond
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while.cond: ; preds = %while.cond.preheader, %while.cond
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%src.pn = phi ptr [ %curr.0, %while.cond ], [ %src, %while.cond.preheader ]
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%curr.0 = getelementptr inbounds i8, ptr %src.pn, i64 4
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%1 = load i32, ptr %curr.0, align 4
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%tobool.not = icmp eq i32 %1, 0
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br i1 %tobool.not, label %while.end, label %while.cond
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while.end: ; preds = %while.cond
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%curr.0.lcssa = phi ptr [ %curr.0, %while.cond ]
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%sub.ptr.lhs.cast = ptrtoint ptr %curr.0.lcssa to i64
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%sub.ptr.rhs.cast = ptrtoint ptr %src to i64
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%sub.ptr.sub = sub i64 %sub.ptr.lhs.cast, %sub.ptr.rhs.cast
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%sub.ptr.div = ashr exact i64 %sub.ptr.sub, 2
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br label %return
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return: ; preds = %entry, %lor.lhs.false, %while.end
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%retval.0 = phi i64 [ %sub.ptr.div, %while.end ], [ 0, %lor.lhs.false ], [ 0, %entry ]
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ret i64 %retval.0
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}
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define i64 @invalid_char_size(ptr %src) {
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; CHECK-LABEL: define i64 @invalid_char_size(
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; CHECK-SAME: ptr [[SRC:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*]]:
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq ptr [[SRC]], null
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; CHECK-NEXT: br i1 [[CMP]], label %[[RETURN:.*]], label %[[LOR_LHS_FALSE:.*]]
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; CHECK: [[LOR_LHS_FALSE]]:
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; CHECK-NEXT: [[TMP0:%.*]] = load i16, ptr [[SRC]], align 2
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; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i16 [[TMP0]], 0
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; CHECK-NEXT: br i1 [[CMP1]], label %[[RETURN]], label %[[WHILE_COND_PREHEADER:.*]]
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; CHECK: [[WHILE_COND_PREHEADER]]:
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; CHECK-NEXT: br label %[[WHILE_COND:.*]]
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; CHECK: [[WHILE_COND]]:
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; CHECK-NEXT: [[SRC_PN:%.*]] = phi ptr [ [[CURR_0:%.*]], %[[WHILE_COND]] ], [ [[SRC]], %[[WHILE_COND_PREHEADER]] ]
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; CHECK-NEXT: [[CURR_0]] = getelementptr inbounds i8, ptr [[SRC_PN]], i64 2
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; CHECK-NEXT: [[TMP1:%.*]] = load i16, ptr [[CURR_0]], align 2
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; CHECK-NEXT: [[TOBOOL_NOT:%.*]] = icmp eq i16 [[TMP1]], 0
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; CHECK-NEXT: br i1 [[TOBOOL_NOT]], label %[[WHILE_END:.*]], label %[[WHILE_COND]]
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; CHECK: [[WHILE_END]]:
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; CHECK-NEXT: [[CURR_0_LCSSA:%.*]] = phi ptr [ [[CURR_0]], %[[WHILE_COND]] ]
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; CHECK-NEXT: [[SUB_PTR_LHS_CAST:%.*]] = ptrtoint ptr [[CURR_0_LCSSA]] to i64
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; CHECK-NEXT: [[SUB_PTR_RHS_CAST:%.*]] = ptrtoint ptr [[SRC]] to i64
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; CHECK-NEXT: [[SUB_PTR_SUB:%.*]] = sub i64 [[SUB_PTR_LHS_CAST]], [[SUB_PTR_RHS_CAST]]
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; CHECK-NEXT: [[SUB_PTR_DIV:%.*]] = ashr exact i64 [[SUB_PTR_SUB]], 1
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; CHECK-NEXT: br label %[[RETURN]]
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; CHECK: [[RETURN]]:
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; CHECK-NEXT: [[RETVAL_0:%.*]] = phi i64 [ [[SUB_PTR_DIV]], %[[WHILE_END]] ], [ 0, %[[LOR_LHS_FALSE]] ], [ 0, %[[ENTRY]] ]
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; CHECK-NEXT: ret i64 [[RETVAL_0]]
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;
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entry:
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%cmp = icmp eq ptr %src, null
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br i1 %cmp, label %return, label %lor.lhs.false
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lor.lhs.false: ; preds = %entry
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%0 = load i16, ptr %src, align 2
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%cmp1 = icmp eq i16 %0, 0
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br i1 %cmp1, label %return, label %while.cond.preheader
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while.cond.preheader: ; preds = %lor.lhs.false
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br label %while.cond
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while.cond: ; preds = %while.cond.preheader, %while.cond
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%src.pn = phi ptr [ %curr.0, %while.cond ], [ %src, %while.cond.preheader ]
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%curr.0 = getelementptr inbounds i8, ptr %src.pn, i64 2
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%1 = load i16, ptr %curr.0, align 2
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%tobool.not = icmp eq i16 %1, 0
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br i1 %tobool.not, label %while.end, label %while.cond
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while.end: ; preds = %while.cond
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%curr.0.lcssa = phi ptr [ %curr.0, %while.cond ]
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%sub.ptr.lhs.cast = ptrtoint ptr %curr.0.lcssa to i64
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%sub.ptr.rhs.cast = ptrtoint ptr %src to i64
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%sub.ptr.sub = sub i64 %sub.ptr.lhs.cast, %sub.ptr.rhs.cast
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%sub.ptr.div = ashr exact i64 %sub.ptr.sub, 1
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br label %return
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return: ; preds = %entry, %lor.lhs.false, %while.end
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%retval.0 = phi i64 [ %sub.ptr.div, %while.end ], [ 0, %lor.lhs.false ], [ 0, %entry ]
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ret i64 %retval.0
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}
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!llvm.module.flags = !{!0}
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!0 = !{i32 1, !"wchar_size", i32 4}
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