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bc1b60a38c
The (seldom-used) TBI-aware optimization had a typo lying dormant since it was first introduced, in r252573: when asking for demanded bits, it told TLI that it was running after legalize, where the opposite was true. This is an important piece of information, that the demanded bits analysis uses to make assumptions about the node. r301019 added such an assumption, which was broken by the TBI combine. Instead, pass the correct flags to TLO. llvm-svn: 309323
114 lines
2.7 KiB
LLVM
114 lines
2.7 KiB
LLVM
; RUN: llc -aarch64-use-tbi -mtriple=arm64-apple-ios8.0.0 < %s \
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; RUN: | FileCheck --check-prefix=TBI --check-prefix=BOTH %s
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; RUN: llc -aarch64-use-tbi -mtriple=arm64-apple-ios7.1.0 < %s \
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; RUN: | FileCheck --check-prefix=NO_TBI --check-prefix=BOTH %s
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; BOTH-LABEL:ld_and32:
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; TBI-NOT: and x
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; NO_TBI: and x
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define i32 @ld_and32(i64 %p) {
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%and = and i64 %p, 72057594037927935
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%cast = inttoptr i64 %and to i32*
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%load = load i32, i32* %cast
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ret i32 %load
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}
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; load (r & MASK) + 4
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; BOTH-LABEL:ld_and_plus_offset:
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; TBI-NOT: and x
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; NO_TBI: and x
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define i32 @ld_and_plus_offset(i64 %p) {
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%and = and i64 %p, 72057594037927935
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%cast = inttoptr i64 %and to i32*
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%gep = getelementptr i32, i32* %cast, i64 4
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%load = load i32, i32* %gep
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ret i32 %load
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}
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; load (r & WIDER_MASK)
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; BOTH-LABEL:ld_and32_wider:
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; TBI-NOT: and x
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; NO_TBI: and x
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define i32 @ld_and32_wider(i64 %p) {
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%and = and i64 %p, 1152921504606846975
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%cast = inttoptr i64 %and to i32*
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%load = load i32, i32* %cast
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ret i32 %load
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}
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; BOTH-LABEL:ld_and64:
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; TBI-NOT: and x
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; NO_TBI: and x
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define i64 @ld_and64(i64 %p) {
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%and = and i64 %p, 72057594037927935
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%cast = inttoptr i64 %and to i64*
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%load = load i64, i64* %cast
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ret i64 %load
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}
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; BOTH-LABEL:st_and32:
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; TBI-NOT: and x
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; NO_TBI: and x
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define void @st_and32(i64 %p, i32 %v) {
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%and = and i64 %p, 72057594037927935
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%cast = inttoptr i64 %and to i32*
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store i32 %v, i32* %cast
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ret void
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}
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; load (x1 + x2) & MASK
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; BOTH-LABEL:ld_ro:
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; TBI-NOT: and x
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; NO_TBI: and x
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define i32 @ld_ro(i64 %a, i64 %b) {
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%p = add i64 %a, %b
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%and = and i64 %p, 72057594037927935
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%cast = inttoptr i64 %and to i32*
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%load = load i32, i32* %cast
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ret i32 %load
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}
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; load (r1 & MASK) + r2
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; BOTH-LABEL:ld_ro2:
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; TBI-NOT: and x
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; NO_TBI: and x
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define i32 @ld_ro2(i64 %a, i64 %b) {
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%and = and i64 %a, 72057594037927935
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%p = add i64 %and, %b
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%cast = inttoptr i64 %p to i32*
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%load = load i32, i32* %cast
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ret i32 %load
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}
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; load (r1 & MASK) | r2
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; BOTH-LABEL:ld_indirect_and:
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; TBI-NOT: and x
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; NO_TBI: and x
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define i32 @ld_indirect_and(i64 %r1, i64 %r2) {
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%and = and i64 %r1, 72057594037927935
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%p = or i64 %and, %r2
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%cast = inttoptr i64 %p to i32*
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%load = load i32, i32* %cast
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ret i32 %load
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}
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; BOTH-LABEL:ld_and32_narrower:
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; BOTH: and x
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define i32 @ld_and32_narrower(i64 %p) {
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%and = and i64 %p, 36028797018963967
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%cast = inttoptr i64 %and to i32*
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%load = load i32, i32* %cast
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ret i32 %load
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}
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; BOTH-LABEL:ld_and8:
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; BOTH: and x
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define i32 @ld_and8(i64 %base, i8 %off) {
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%off_masked = and i8 %off, 63
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%off_64 = zext i8 %off_masked to i64
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%p = add i64 %base, %off_64
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%cast = inttoptr i64 %p to i32*
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%load = load i32, i32* %cast
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ret i32 %load
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}
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