derek.holloway
7502bf64a4
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59 lines
2.1 KiB
LLVM
59 lines
2.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
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; RUN: opt -p indvars -S %s | FileCheck %s
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target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
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; Test for https://github.com/llvm/llvm-project/issues/82243.
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; Check that NUW flag on hoisted wide IV is dropped properly.
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define void @test_pr82243(ptr %f) {
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; CHECK-LABEL: define void @test_pr82243(
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; CHECK-SAME: ptr [[F:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[OUTER_HEADER:%.*]]
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; CHECK: outer.header:
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; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], [[OUTER_LATCH:%.*]] ], [ 1, [[ENTRY:%.*]] ]
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; CHECK-NEXT: [[GEP_IV_EXT:%.*]] = getelementptr i32, ptr [[F]], i64 [[INDVARS_IV]]
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; CHECK-NEXT: store i32 1, ptr [[GEP_IV_EXT]], align 4
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; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nsw i64 [[INDVARS_IV]], -1
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; CHECK-NEXT: [[TMP0:%.*]] = trunc nuw nsw i64 [[INDVARS_IV_NEXT]] to i32
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; CHECK-NEXT: [[SHL:%.*]] = shl i32 123, [[TMP0]]
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; CHECK-NEXT: [[GEP_SHL:%.*]] = getelementptr i32, ptr [[F]], i32 [[SHL]]
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; CHECK-NEXT: br label [[INNER_HEADER:%.*]]
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; CHECK: inner.header:
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; CHECK-NEXT: store i32 0, ptr [[GEP_SHL]], align 4
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; CHECK-NEXT: br i1 false, label [[INNER_LATCH:%.*]], label [[EXIT:%.*]]
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; CHECK: inner.latch:
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; CHECK-NEXT: br i1 false, label [[INNER_HEADER]], label [[OUTER_LATCH]]
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; CHECK: outer.latch:
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; CHECK-NEXT: br label [[OUTER_HEADER]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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;
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entry:
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br label %outer.header
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outer.header:
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%iv = phi i32 [ 1, %entry ], [ %iv.next, %outer.latch ]
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%iv.sext = sext i32 %iv to i64
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%gep.iv.ext = getelementptr i32, ptr %f, i64 %iv.sext
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store i32 1, ptr %gep.iv.ext
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%sub = add i32 %iv, -1
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%shl = shl i32 123, %sub
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%gep.shl = getelementptr i32, ptr %f, i32 %shl
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br label %inner.header
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inner.header:
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store i32 0, ptr %gep.shl, align 4
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br i1 false, label %inner.latch, label %exit
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inner.latch:
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br i1 false, label %inner.header, label %outer.latch
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outer.latch:
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%iv.next = add i32 %iv, -1
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br label %outer.header
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exit:
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ret void
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}
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