derek.holloway
7502bf64a4
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46 lines
1.3 KiB
LLVM
46 lines
1.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 6
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; RUN: llc -mtriple=i386-unknown-code16 < %s | FileCheck %s
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;; In 16-bit mode, displacements are limited to [-65535,65535] (R_386_16).
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;; Test boundary conditions for offset folding.
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@X = external global i32, align 4
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;; -65535 is within range, should fold
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define i32 @neg_65535() {
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; CHECK-LABEL: neg_65535:
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; CHECK: # %bb.0:
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; CHECK-NEXT: leal X+65535, %eax
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; CHECK-NEXT: retl
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ret i32 add (i32 ptrtoint (ptr @X to i32), i32 65535)
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}
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;; 65535 is within range, should fold
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define i32 @pos_65535() {
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; CHECK-LABEL: pos_65535:
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; CHECK: # %bb.0:
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; CHECK-NEXT: leal X-65535, %eax
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; CHECK-NEXT: retl
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ret i32 sub (i32 ptrtoint (ptr @X to i32), i32 65535)
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}
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;; -65536 is outside range, should NOT fold
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define i32 @neg_65536() {
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; CHECK-LABEL: neg_65536:
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; CHECK: # %bb.0:
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; CHECK-NEXT: movl $65536, %eax # imm = 0x10000
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; CHECK-NEXT: leal X(%eax), %eax
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; CHECK-NEXT: retl
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ret i32 add (i32 ptrtoint (ptr @X to i32), i32 65536)
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}
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;; 65536 is outside range, should NOT fold
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define i32 @pos_65536() {
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; CHECK-LABEL: pos_65536:
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; CHECK: # %bb.0:
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; CHECK-NEXT: movl $-65536, %eax # imm = 0xFFFF0000
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; CHECK-NEXT: leal X(%eax), %eax
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; CHECK-NEXT: retl
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ret i32 sub (i32 ptrtoint (ptr @X to i32), i32 65536)
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}
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