42 lines
720 B
Plaintext
42 lines
720 B
Plaintext
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# RUN: llc -march=mips64 -o - %s -run-pass=simple-register-coalescing | FileCheck %s
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---
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name: f
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tracksRegLiveness: true
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body: |
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bb.0:
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successors: %bb.1
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%21:gpr32 = ADDiu $zero, 0
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%22:gpr32 = COPY %21
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%22:gpr32 = ADDiu %22, 1
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J %bb.1, implicit-def dead $at
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bb.1:
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successors: %bb.2
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BEQ %22, $zero, %bb.2, implicit-def $at
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bb.2:
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successors: %bb.2, %bb.3
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%22:gpr32 = COPY %21
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%21:gpr32 = COPY %22
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BEQ undef %0:gpr32, $zero, %bb.2, implicit-def $at
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bb.3:
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...
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# We should not hoist the
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#
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# %22:gpr32 = COPY %21
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#
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# into bb.1 since %22 is used in the BEQ.
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# CHECK-LABEL: bb.1:
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# CHECK-NOT: COPY
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# CHECK: BEQ
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# CHECK-LABEL: bb.2:
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