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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
; RUN: opt -p indvars -S %s | FileCheck %s
target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
; Test for https://github.com/llvm/llvm-project/issues/82243.
; Check that NUW flag on hoisted wide IV is dropped properly.
define void @test_pr82243(ptr %f) {
; CHECK-LABEL: define void @test_pr82243(
; CHECK-SAME: ptr [[F:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[OUTER_HEADER:%.*]]
; CHECK: outer.header:
; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], [[OUTER_LATCH:%.*]] ], [ 1, [[ENTRY:%.*]] ]
; CHECK-NEXT: [[GEP_IV_EXT:%.*]] = getelementptr i32, ptr [[F]], i64 [[INDVARS_IV]]
; CHECK-NEXT: store i32 1, ptr [[GEP_IV_EXT]], align 4
; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nsw i64 [[INDVARS_IV]], -1
; CHECK-NEXT: [[TMP0:%.*]] = trunc nuw nsw i64 [[INDVARS_IV_NEXT]] to i32
; CHECK-NEXT: [[SHL:%.*]] = shl i32 123, [[TMP0]]
; CHECK-NEXT: [[GEP_SHL:%.*]] = getelementptr i32, ptr [[F]], i32 [[SHL]]
; CHECK-NEXT: br label [[INNER_HEADER:%.*]]
; CHECK: inner.header:
; CHECK-NEXT: store i32 0, ptr [[GEP_SHL]], align 4
; CHECK-NEXT: br i1 false, label [[INNER_LATCH:%.*]], label [[EXIT:%.*]]
; CHECK: inner.latch:
; CHECK-NEXT: br i1 false, label [[INNER_HEADER]], label [[OUTER_LATCH]]
; CHECK: outer.latch:
; CHECK-NEXT: br label [[OUTER_HEADER]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %outer.header
outer.header:
%iv = phi i32 [ 1, %entry ], [ %iv.next, %outer.latch ]
%iv.sext = sext i32 %iv to i64
%gep.iv.ext = getelementptr i32, ptr %f, i64 %iv.sext
store i32 1, ptr %gep.iv.ext
%sub = add i32 %iv, -1
%shl = shl i32 123, %sub
%gep.shl = getelementptr i32, ptr %f, i32 %shl
br label %inner.header
inner.header:
store i32 0, ptr %gep.shl, align 4
br i1 false, label %inner.latch, label %exit
inner.latch:
br i1 false, label %inner.header, label %outer.latch
outer.latch:
%iv.next = add i32 %iv, -1
br label %outer.header
exit:
ret void
}
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