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