580310ff0c
Demand that an immediate offset to a PC relative address fits in 32 bits, or else load it into a register and perform a separate add. Verify in the assembler that such immediate offsets fit the bitwidth. Even though the final address of a Load Address Relative Long may fit in 32 bits even with a >32 bit offset (depending on where the symbol lives relative to PC), the GNU toolchain demands the offset by itself to be in range. This patch adapts the same behavior for llvm. Review: Ulrich Weigand https://reviews.llvm.org/D69749
32 lines
791 B
LLVM
32 lines
791 B
LLVM
; Test that a huge address offset is loaded into a register and then added
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; separately.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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@a = common dso_local global i32 0, align 4
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define i64 @f1() {
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; CHECK-LABEL: f1:
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; CHECK: llihl %r0, 829
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; CHECK: oilf %r0, 4294966308
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; CHECK: larl %r2, a
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; CHECK: agr %r2, %r0
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; CHECK: br %r14
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ret i64 add (i64 ptrtoint (i32* @a to i64), i64 3564822854692)
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}
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define signext i32 @f2() {
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; CHECK-LABEL: f2:
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; CHECK: llihl %r0, 829
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; CHECK: oilf %r0, 4294966308
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; CHECK: larl %r1, a
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; CHECK: agr %r1, %r0
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; CHECK: lgf %r2, 0(%r1)
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; CHECK: br %r14
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entry:
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%0 = load i32, i32* inttoptr (i64 add (i64 ptrtoint (i32* @a to i64),
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i64 3564822854692) to i32*)
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ret i32 %0
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}
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