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https://github.com/RPCS3/llvm-mirror.git
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b10d38fe26
This is r334750 (which was reverted in r334754) with a fix for an uninitialized variable that was caught by msan. Original commit message: > If a copy bundle happens to involve overlapping registers, we can end > up with emitting the copies in an order that ends up clobbering some > of the subregisters. Since instructions in the copy bundle > semantically happen at the same time, this is incorrect and we need to > make sure we order the copies such that this doesn't happen. llvm-svn: 334756
81 lines
2.0 KiB
YAML
81 lines
2.0 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=greedy -run-pass=virtregrewriter %s -o - | FileCheck %s
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---
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name: func0
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body: |
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bb.0:
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; Make sure we don't clobber q3 when we expand the bundle
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; CHECK-LABEL: name: func0
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; CHECK: $x0 = IMPLICIT_DEF
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; CHECK: $q0_q1_q2_q3 = IMPLICIT_DEF
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; CHECK: $q4 = COPY $q3
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; CHECK: $q1_q2_q3 = COPY $q0_q1_q2
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; CHECK: ST4i64 $q1_q2_q3_q4, 0, $x0
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$x0 = IMPLICIT_DEF
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$q0_q1_q2_q3 = IMPLICIT_DEF
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$q1_q2_q3 = COPY $q0_q1_q2 {
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$q4 = COPY $q3
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}
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ST4i64 $q1_q2_q3_q4, 0, $x0
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...
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---
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name: func1
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body: |
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bb.0:
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; If it was already ordered, make sure we don't break it
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; CHECK-LABEL: name: func1
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; CHECK: $x0 = IMPLICIT_DEF
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; CHECK: $q0_q1_q2_q3 = IMPLICIT_DEF
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; CHECK: $q4 = COPY $q3
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; CHECK: $q1_q2_q3 = COPY $q0_q1_q2
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; CHECK: ST4i64 $q1_q2_q3_q4, 0, $x0
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$x0 = IMPLICIT_DEF
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$q0_q1_q2_q3 = IMPLICIT_DEF
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$q4 = COPY $q3 {
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$q1_q2_q3 = COPY $q0_q1_q2
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}
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ST4i64 $q1_q2_q3_q4, 0, $x0
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...
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---
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name: func2
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body: |
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bb.0:
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; A bit less realistic, but check that we handle multiple nodes
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; CHECK-LABEL: name: func2
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; CHECK: $x0 = IMPLICIT_DEF
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; CHECK: $q0_q1_q2_q3 = IMPLICIT_DEF
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; CHECK: $q3 = COPY $q2
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; CHECK: $q4 = COPY $q1
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; CHECK: $q1_q2 = COPY $q0_q1
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; CHECK: ST4i64 $q1_q2_q3_q4, 0, $x0
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$x0 = IMPLICIT_DEF
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$q0_q1_q2_q3 = IMPLICIT_DEF
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$q1_q2 = COPY $q0_q1 {
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$q3 = COPY $q2
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$q4 = COPY $q1
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}
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ST4i64 $q1_q2_q3_q4, 0, $x0
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...
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---
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name: func3
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body: |
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bb.0:
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; If there was nothing wrong, don't change the order for no reason
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; CHECK-LABEL: name: func3
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; CHECK: $x0 = IMPLICIT_DEF
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; CHECK: $q1_q2_q3_q4 = IMPLICIT_DEF
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; CHECK: $q0_q1 = COPY $q1_q2
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; CHECK: $q2_q3 = COPY $q3_q4
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; CHECK: ST4i64 $q0_q1_q2_q3, 0, $x0
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$x0 = IMPLICIT_DEF
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$q1_q2_q3_q4 = IMPLICIT_DEF
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$q0_q1 = COPY $q1_q2 {
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$q2_q3 = COPY $q3_q4
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}
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ST4i64 $q0_q1_q2_q3, 0, $x0
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...
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