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Diffstat (limited to 'test/Transforms/InstCombine/descale-zero.ll')
| -rw-r--r-- | test/Transforms/InstCombine/descale-zero.ll | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/descale-zero.ll b/test/Transforms/InstCombine/descale-zero.ll new file mode 100644 index 0000000..7990fdb --- /dev/null +++ b/test/Transforms/InstCombine/descale-zero.ll @@ -0,0 +1,21 @@ +; RUN: opt < %s -instcombine -S | FileCheck %s + +target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" +target triple = "x86_64-apple-macosx10.10.0" + +define internal i8* @descale_zero() { +entry: +; CHECK: load i16** inttoptr (i64 48 to i16**), align 16 +; CHECK-NEXT: bitcast i16* +; CHECK-NEXT: ret i8* + %i16_ptr = load i16** inttoptr (i64 48 to i16**), align 16 + %num = load i64* inttoptr (i64 64 to i64*), align 64 + %num_times_2 = shl i64 %num, 1 + %num_times_2_plus_4 = add i64 %num_times_2, 4 + %i8_ptr = bitcast i16* %i16_ptr to i8* + %i8_ptr_num_times_2_plus_4 = getelementptr i8* %i8_ptr, i64 %num_times_2_plus_4 + %num_times_neg2 = mul i64 %num, -2 + %num_times_neg2_minus_4 = add i64 %num_times_neg2, -4 + %addr = getelementptr i8* %i8_ptr_num_times_2_plus_4, i64 %num_times_neg2_minus_4 + ret i8* %addr +} |