162 lines
5.8 KiB
YAML
162 lines
5.8 KiB
YAML
# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
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# RUN: llc -mtriple aarch64-apple-ios -run-pass=aarch64-prelegalizer-combiner -verify-machineinstrs %s -o - | FileCheck %s --check-prefix=DARWIN
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# RUN: llc -mtriple aarch64 -run-pass=aarch64-prelegalizer-combiner -verify-machineinstrs %s -o - | FileCheck %s --check-prefix=UNKNOWN
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#
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# Check that on Darwin we can combine to G_BZERO. Without Darwin, this should
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# stay as memset.
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--- |
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define void @bzero_unknown_width() { unreachable }
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define void @bzero_tail_unknown_width() { unreachable }
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define void @bzero_constant_width() { unreachable }
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define void @bzero_constant_width_minsize() minsize { unreachable }
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define void @not_zero() minsize { unreachable }
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...
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---
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name: bzero_unknown_width
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: $x0, $x1
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; Always use G_BZERO when the memset width is unknown on Darwin.
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; DARWIN-LABEL: name: bzero_unknown_width
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; DARWIN: liveins: $x0, $x1
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; DARWIN-NEXT: {{ $}}
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; DARWIN-NEXT: %ptr:_(p0) = COPY $x0
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; DARWIN-NEXT: %width:_(s64) = COPY $x1
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; DARWIN-NEXT: G_BZERO %ptr(p0), %width(s64), 0 :: (store (s32))
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; DARWIN-NEXT: RET_ReallyLR
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;
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; UNKNOWN-LABEL: name: bzero_unknown_width
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; UNKNOWN: liveins: $x0, $x1
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; UNKNOWN-NEXT: {{ $}}
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; UNKNOWN-NEXT: %ptr:_(p0) = COPY $x0
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; UNKNOWN-NEXT: %zero:_(s8) = G_CONSTANT i8 0
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; UNKNOWN-NEXT: %width:_(s64) = COPY $x1
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; UNKNOWN-NEXT: G_MEMSET %ptr(p0), %zero(s8), %width(s64), 0 :: (store (s32))
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; UNKNOWN-NEXT: RET_ReallyLR
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%ptr:_(p0) = COPY $x0
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%zero:_(s8) = G_CONSTANT i8 0
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%width:_(s64) = COPY $x1
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G_MEMSET %ptr(p0), %zero(s8), %width(s64), 0 :: (store (s32))
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RET_ReallyLR
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...
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---
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name: bzero_tail_unknown_width
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: $x0, $x1
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; DARWIN-LABEL: name: bzero_tail_unknown_width
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; DARWIN: liveins: $x0, $x1
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; DARWIN-NEXT: {{ $}}
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; DARWIN-NEXT: %ptr:_(p0) = COPY $x0
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; DARWIN-NEXT: %width:_(s64) = COPY $x1
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; DARWIN-NEXT: G_BZERO %ptr(p0), %width(s64), 1 :: (store (s32))
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; DARWIN-NEXT: RET_ReallyLR
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;
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; UNKNOWN-LABEL: name: bzero_tail_unknown_width
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; UNKNOWN: liveins: $x0, $x1
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; UNKNOWN-NEXT: {{ $}}
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; UNKNOWN-NEXT: %ptr:_(p0) = COPY $x0
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; UNKNOWN-NEXT: %zero:_(s8) = G_CONSTANT i8 0
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; UNKNOWN-NEXT: %width:_(s64) = COPY $x1
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; UNKNOWN-NEXT: G_MEMSET %ptr(p0), %zero(s8), %width(s64), 1 :: (store (s32))
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; UNKNOWN-NEXT: RET_ReallyLR
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%ptr:_(p0) = COPY $x0
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%zero:_(s8) = G_CONSTANT i8 0
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%width:_(s64) = COPY $x1
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G_MEMSET %ptr(p0), %zero(s8), %width(s64), 1 :: (store (s32))
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RET_ReallyLR
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...
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---
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name: bzero_constant_width
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: $x0, $x1
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; For values >256, we should use G_BZERO on Darwin.
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; DARWIN-LABEL: name: bzero_constant_width
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; DARWIN: liveins: $x0, $x1
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; DARWIN-NEXT: {{ $}}
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; DARWIN-NEXT: %ptr:_(p0) = COPY $x0
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; DARWIN-NEXT: %width:_(s64) = G_CONSTANT i64 1024
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; DARWIN-NEXT: G_BZERO %ptr(p0), %width(s64), 0 :: (store (s32))
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; DARWIN-NEXT: RET_ReallyLR
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;
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; UNKNOWN-LABEL: name: bzero_constant_width
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; UNKNOWN: liveins: $x0, $x1
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; UNKNOWN-NEXT: {{ $}}
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; UNKNOWN-NEXT: %ptr:_(p0) = COPY $x0
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; UNKNOWN-NEXT: %zero:_(s8) = G_CONSTANT i8 0
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; UNKNOWN-NEXT: %width:_(s64) = G_CONSTANT i64 1024
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; UNKNOWN-NEXT: G_MEMSET %ptr(p0), %zero(s8), %width(s64), 0 :: (store (s32))
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; UNKNOWN-NEXT: RET_ReallyLR
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%ptr:_(p0) = COPY $x0
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%zero:_(s8) = G_CONSTANT i8 0
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%width:_(s64) = G_CONSTANT i64 1024
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G_MEMSET %ptr(p0), %zero(s8), %width(s64), 0 :: (store (s32))
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RET_ReallyLR
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...
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---
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name: bzero_constant_width_minsize
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: $x0, $x1
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; With minsize, we should always use G_BZERO to avoid a copy from wzr.
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; DARWIN-LABEL: name: bzero_constant_width_minsize
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; DARWIN: liveins: $x0, $x1
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; DARWIN-NEXT: {{ $}}
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; DARWIN-NEXT: %ptr:_(p0) = COPY $x0
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; DARWIN-NEXT: %width:_(s64) = G_CONSTANT i64 256
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; DARWIN-NEXT: G_BZERO %ptr(p0), %width(s64), 0 :: (store (s32))
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; DARWIN-NEXT: RET_ReallyLR
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;
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; UNKNOWN-LABEL: name: bzero_constant_width_minsize
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; UNKNOWN: liveins: $x0, $x1
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; UNKNOWN-NEXT: {{ $}}
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; UNKNOWN-NEXT: %ptr:_(p0) = COPY $x0
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; UNKNOWN-NEXT: %zero:_(s8) = G_CONSTANT i8 0
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; UNKNOWN-NEXT: %width:_(s64) = G_CONSTANT i64 256
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; UNKNOWN-NEXT: G_MEMSET %ptr(p0), %zero(s8), %width(s64), 0 :: (store (s32))
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; UNKNOWN-NEXT: RET_ReallyLR
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%ptr:_(p0) = COPY $x0
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%zero:_(s8) = G_CONSTANT i8 0
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%width:_(s64) = G_CONSTANT i64 256
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G_MEMSET %ptr(p0), %zero(s8), %width(s64), 0 :: (store (s32))
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RET_ReallyLR
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...
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---
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name: not_zero
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: $x0, $x1
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; When the value isn't 0, don't create G_BZERO.
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; DARWIN-LABEL: name: not_zero
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; DARWIN: liveins: $x0, $x1
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; DARWIN-NEXT: {{ $}}
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; DARWIN-NEXT: %ptr:_(p0) = COPY $x0
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; DARWIN-NEXT: %not_zero:_(s8) = G_CONSTANT i8 1
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; DARWIN-NEXT: %width:_(s64) = G_CONSTANT i64 256
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; DARWIN-NEXT: G_MEMSET %ptr(p0), %not_zero(s8), %width(s64), 0 :: (store (s32))
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; DARWIN-NEXT: RET_ReallyLR
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;
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; UNKNOWN-LABEL: name: not_zero
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; UNKNOWN: liveins: $x0, $x1
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; UNKNOWN-NEXT: {{ $}}
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; UNKNOWN-NEXT: %ptr:_(p0) = COPY $x0
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; UNKNOWN-NEXT: %not_zero:_(s8) = G_CONSTANT i8 1
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; UNKNOWN-NEXT: %width:_(s64) = G_CONSTANT i64 256
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; UNKNOWN-NEXT: G_MEMSET %ptr(p0), %not_zero(s8), %width(s64), 0 :: (store (s32))
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; UNKNOWN-NEXT: RET_ReallyLR
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%ptr:_(p0) = COPY $x0
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%not_zero:_(s8) = G_CONSTANT i8 1
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%width:_(s64) = G_CONSTANT i64 256
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G_MEMSET %ptr(p0), %not_zero(s8), %width(s64), 0 :: (store (s32))
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RET_ReallyLR
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