ext-load.ll
2.41 KB
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; RUN: opt < %s -cost-model -analyze -mtriple=systemz-unknown -mcpu=z13 | FileCheck %s
;
; Test that an extension of a load does not get an additional cost in cases
; where the load performs the extension.
define void @sext() {
%li8 = load i8, i8* undef
sext i8 %li8 to i16
sext i8 %li8 to i32
sext i8 %li8 to i64
%li16 = load i16, i16* undef
sext i16 %li16 to i32
sext i16 %li16 to i64
%li32 = load i32, i32* undef
sext i32 %li32 to i64
ret void
; CHECK: Cost Model: Found an estimated cost of 1 for instruction: %li8 = load i8, i8* undef
; CHECK: Cost Model: Found an estimated cost of 0 for instruction: %1 = sext i8 %li8 to i16
; CHECK: Cost Model: Found an estimated cost of 0 for instruction: %2 = sext i8 %li8 to i32
; CHECK: Cost Model: Found an estimated cost of 0 for instruction: %3 = sext i8 %li8 to i64
; CHECK: Cost Model: Found an estimated cost of 1 for instruction: %li16 = load i16, i16* undef
; CHECK: Cost Model: Found an estimated cost of 0 for instruction: %4 = sext i16 %li16 to i32
; CHECK: Cost Model: Found an estimated cost of 0 for instruction: %5 = sext i16 %li16 to i64
; CHECK: Cost Model: Found an estimated cost of 1 for instruction: %li32 = load i32, i32* undef
; CHECK: Cost Model: Found an estimated cost of 0 for instruction: %6 = sext i32 %li32 to i64
}
define void @zext() {
%li8 = load i8, i8* undef
zext i8 %li8 to i16
zext i8 %li8 to i32
zext i8 %li8 to i64
%li16 = load i16, i16* undef
zext i16 %li16 to i32
zext i16 %li16 to i64
%li32 = load i32, i32* undef
zext i32 %li32 to i64
ret void
; CHECK: Cost Model: Found an estimated cost of 1 for instruction: %li8 = load i8, i8* undef
; CHECK: Cost Model: Found an estimated cost of 0 for instruction: %1 = zext i8 %li8 to i16
; CHECK: Cost Model: Found an estimated cost of 0 for instruction: %2 = zext i8 %li8 to i32
; CHECK: Cost Model: Found an estimated cost of 0 for instruction: %3 = zext i8 %li8 to i64
; CHECK: Cost Model: Found an estimated cost of 1 for instruction: %li16 = load i16, i16* undef
; CHECK: Cost Model: Found an estimated cost of 0 for instruction: %4 = zext i16 %li16 to i32
; CHECK: Cost Model: Found an estimated cost of 0 for instruction: %5 = zext i16 %li16 to i64
; CHECK: Cost Model: Found an estimated cost of 1 for instruction: %li32 = load i32, i32* undef
; CHECK: Cost Model: Found an estimated cost of 0 for instruction: %6 = zext i32 %li32 to i64
}