1 ; RUN: opt < %s -cost-model -analyze -mtriple=systemz-unknown -mcpu=z13 | FileCheck %s 2 ; 3 ; Test that an extension of a load does not get an additional cost in cases 4 ; where the load performs the extension. 5 6 define void @sext() { 7 %li8 = load i8, i8* undef 8 sext i8 %li8 to i16 9 sext i8 %li8 to i32 10 sext i8 %li8 to i64 11 12 %li16 = load i16, i16* undef 13 sext i16 %li16 to i32 14 sext i16 %li16 to i64 15 16 %li32 = load i32, i32* undef 17 sext i32 %li32 to i64 18 19 ret void 20 21 ; CHECK: Cost Model: Found an estimated cost of 1 for instruction: %li8 = load i8, i8* undef 22 ; CHECK: Cost Model: Found an estimated cost of 0 for instruction: %1 = sext i8 %li8 to i16 23 ; CHECK: Cost Model: Found an estimated cost of 0 for instruction: %2 = sext i8 %li8 to i32 24 ; CHECK: Cost Model: Found an estimated cost of 0 for instruction: %3 = sext i8 %li8 to i64 25 ; CHECK: Cost Model: Found an estimated cost of 1 for instruction: %li16 = load i16, i16* undef 26 ; CHECK: Cost Model: Found an estimated cost of 0 for instruction: %4 = sext i16 %li16 to i32 27 ; CHECK: Cost Model: Found an estimated cost of 0 for instruction: %5 = sext i16 %li16 to i64 28 ; CHECK: Cost Model: Found an estimated cost of 1 for instruction: %li32 = load i32, i32* undef 29 ; CHECK: Cost Model: Found an estimated cost of 0 for instruction: %6 = sext i32 %li32 to i64 30 } 31 32 define void @zext() { 33 %li8 = load i8, i8* undef 34 zext i8 %li8 to i16 35 zext i8 %li8 to i32 36 zext i8 %li8 to i64 37 38 %li16 = load i16, i16* undef 39 zext i16 %li16 to i32 40 zext i16 %li16 to i64 41 42 %li32 = load i32, i32* undef 43 zext i32 %li32 to i64 44 45 ret void 46 47 ; CHECK: Cost Model: Found an estimated cost of 1 for instruction: %li8 = load i8, i8* undef 48 ; CHECK: Cost Model: Found an estimated cost of 0 for instruction: %1 = zext i8 %li8 to i16 49 ; CHECK: Cost Model: Found an estimated cost of 0 for instruction: %2 = zext i8 %li8 to i32 50 ; CHECK: Cost Model: Found an estimated cost of 0 for instruction: %3 = zext i8 %li8 to i64 51 ; CHECK: Cost Model: Found an estimated cost of 1 for instruction: %li16 = load i16, i16* undef 52 ; CHECK: Cost Model: Found an estimated cost of 0 for instruction: %4 = zext i16 %li16 to i32 53 ; CHECK: Cost Model: Found an estimated cost of 0 for instruction: %5 = zext i16 %li16 to i64 54 ; CHECK: Cost Model: Found an estimated cost of 1 for instruction: %li32 = load i32, i32* undef 55 ; CHECK: Cost Model: Found an estimated cost of 0 for instruction: %6 = zext i32 %li32 to i64 56 } 57
