b8f3024a31
Since all optimizations that use range metadata now also handle range attribute, this patch replaces writes of range metadata for call instructions to range attributes.
38 lines
1.5 KiB
LLVM
38 lines
1.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -mcpu=core-avx2 < %s -O3 -S | FileCheck --check-prefix=ALL %s
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; RUN: opt -mcpu=core-avx2 < %s -passes="default<O3>" -S | FileCheck --check-prefix=ALL %s
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; Not only should we be able to make the loop countable,
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; %whatever.next recurrence should be rewritten, making loop dead.
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target triple = "x86_64--"
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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define i32 @cttz(i32 %n, ptr %p1) {
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; ALL-LABEL: @cttz(
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; ALL-NEXT: entry:
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; ALL-NEXT: [[TMP0:%.*]] = shl i32 [[N:%.*]], 1
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; ALL-NEXT: [[TMP1:%.*]] = tail call range(i32 1, 33) i32 @llvm.cttz.i32(i32 [[TMP0]], i1 false)
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; ALL-NEXT: [[TMP2:%.*]] = sub nuw nsw i32 32, [[TMP1]]
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; ALL-NEXT: [[TMP3:%.*]] = sub nuw nsw i32 75, [[TMP1]]
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; ALL-NEXT: store i32 [[TMP3]], ptr [[P1:%.*]], align 4
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; ALL-NEXT: ret i32 [[TMP2]]
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;
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entry:
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br label %while.cond
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while.cond: ; preds = %while.cond, %entry
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%n.addr.0 = phi i32 [ %n, %entry ], [ %shl, %while.cond ]
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%whatever = phi i32 [ 42, %entry ], [ %whatever.next, %while.cond ]
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%i.0 = phi i32 [ 0, %entry ], [ %inc, %while.cond ]
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%shl = shl i32 %n.addr.0, 1
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%tobool = icmp eq i32 %shl, 0
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%inc = add nsw i32 %i.0, 1
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%whatever.next = add i32 %whatever, 1
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br i1 %tobool, label %while.end, label %while.cond
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while.end: ; preds = %while.cond
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store i32 %whatever.next, ptr %p1
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ret i32 %i.0
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}
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