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tests: simplify dont-shuffle-bswaps test

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This should guarantee it tests what we want it to test and no more.
It should probably also run on 64-bit platforms that are not x86-64,
which will often have the vector registers the opt implies.
This commit is contained in:
Jubilee Young 2025-02-09 16:54:53 -08:00
parent 3580698996
commit 4c17270332
1 changed files with 10 additions and 30 deletions
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40
tests/codegen/dont-shuffle-bswaps.rs
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@ -1,11 +1,8 @@
//@ revisions: OPT2 OPT3WINX64 OPT3LINX64
//@ [OPT2] compile-flags: -O
//@ [OPT3LINX64] compile-flags: -C opt-level=3
//@ [OPT3WINX64] compile-flags: -C opt-level=3
//@ [OPT3LINX64] only-linux
//@ [OPT3WINX64] only-windows
//@ [OPT3LINX64] only-x86_64
//@ [OPT3WINX64] only-x86_64
//@ revisions: OPT2 OPT3
//@[OPT2] compile-flags: -Copt-level=2
//@[OPT3] compile-flags: -C opt-level=3
// some targets don't do the opt we are looking for
//@[OPT3] only-64bit
//@ min-llvm-version: 18.1.3
#![crate_type = "lib"]
@ -16,28 +13,11 @@
// to avoid complicating the code.
// CHECK-LABEL: define{{.*}}void @convert(
// CHECK-NOT: shufflevector
// OPT2: store i16
// OPT2-NEXT: getelementptr inbounds{{( nuw)?}} i8, {{.+}} 2
// OPT2-NEXT: store i16
// OPT2-NEXT: getelementptr inbounds{{( nuw)?}} i8, {{.+}} 4
// OPT2-NEXT: store i16
// OPT2-NEXT: getelementptr inbounds{{( nuw)?}} i8, {{.+}} 6
// OPT2-NEXT: store i16
// OPT2-NEXT: getelementptr inbounds{{( nuw)?}} i8, {{.+}} 8
// OPT2-NEXT: store i16
// OPT2-NEXT: getelementptr inbounds{{( nuw)?}} i8, {{.+}} 10
// OPT2-NEXT: store i16
// OPT2-NEXT: getelementptr inbounds{{( nuw)?}} i8, {{.+}} 12
// OPT2-NEXT: store i16
// OPT2-NEXT: getelementptr inbounds{{( nuw)?}} i8, {{.+}} 14
// OPT2-NEXT: store i16
// OPT3LINX64: load <8 x i16>
// OPT3LINX64-NEXT: call <8 x i16> @llvm.bswap
// OPT3LINX64-NEXT: store <8 x i16>
// OPT3WINX64: load <8 x i16>
// OPT3WINX64-NEXT: call <8 x i16> @llvm.bswap
// OPT3WINX64-NEXT: store <8 x i16>
// CHECK-NEXT: ret void
// On higher opt levels, this should just be a bswap:
// OPT3: load <8 x i16>
// OPT3-NEXT: call <8 x i16> @llvm.bswap
// OPT3-NEXT: store <8 x i16>
// OPT3-NEXT: ret void
#[no_mangle]
pub fn convert(value: [u16; 8]) -> [u8; 16] {
#[cfg(target_endian = "little")]