forked from OSchip/llvm-project
21 lines
791 B
LLVM
21 lines
791 B
LLVM
; RUN: opt < %s -instcombine -S | FileCheck %s
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.10.0"
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define internal i8* @descale_zero() {
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entry:
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; CHECK: load i8** inttoptr (i64 48 to i8**), align 16
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; CHECK-NEXT: ret i8*
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%i16_ptr = load i16** inttoptr (i64 48 to i16**), align 16
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%num = load i64* inttoptr (i64 64 to i64*), align 64
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%num_times_2 = shl i64 %num, 1
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%num_times_2_plus_4 = add i64 %num_times_2, 4
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%i8_ptr = bitcast i16* %i16_ptr to i8*
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%i8_ptr_num_times_2_plus_4 = getelementptr i8* %i8_ptr, i64 %num_times_2_plus_4
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%num_times_neg2 = mul i64 %num, -2
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%num_times_neg2_minus_4 = add i64 %num_times_neg2, -4
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%addr = getelementptr i8* %i8_ptr_num_times_2_plus_4, i64 %num_times_neg2_minus_4
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ret i8* %addr
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}
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