4baf29e81e
In the (zext (shl (zext x), cst)) -> (shl (zext x), cst) fold, don't use a bitmask / MaskedValueIsZero as we can't guarantee that the shift amount is in bounds. Fixes #106202
32 lines
952 B
LLVM
32 lines
952 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=s390x-ibm-linux -mcpu=z10 | FileCheck %s
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@g_0 = external dso_local local_unnamed_addr global i16, align 2
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@g_1 = external dso_local local_unnamed_addr global i32, align 4
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@g_2 = external dso_local local_unnamed_addr global i32, align 4
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define void @func() {
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; CHECK-LABEL: func:
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; CHECK: # %bb.0:
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; CHECK-NEXT: lhi %r0, 41
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; CHECK-NEXT: strl %r0, g_1
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; CHECK-NEXT: lhi %r0, 0
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; CHECK-NEXT: strl %r0, g_2
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; CHECK-NEXT: br %r14
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store i32 41, ptr @g_1, align 4
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%1 = load i32, ptr @g_1, align 4
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%2 = load i16, ptr @g_0, align 2
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%3 = zext i16 %2 to i32
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%4 = shl i32 %3, %1
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%5 = zext i32 %4 to i64
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%6 = shl i64 %5, 48
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%7 = ashr exact i64 %6, 48
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%8 = or i64 %7, 0
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%9 = sext i32 %1 to i64
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%10 = icmp sge i64 %8, %9
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%11 = zext i1 %10 to i32
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%12 = or i32 0, %11
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store i32 %12, ptr @g_2, align 4
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ret void
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}
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