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MIR Serialization: Serialize the implicit register flag.
This commit serializes the implicit flag for the register machine operands. It introduces two new keywords into the machine instruction syntax: 'implicit' and 'implicit-def'. The 'implicit' keyword is used for the implicit register operands, and the 'implicit-def' keyword is used for the register operands that have both the implicit and the define flags set. Reviewers: Duncan P. N. Exon Smith Differential Revision: http://reviews.llvm.org/D10709 llvm-svn: 241519
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22 changes: 22 additions & 0 deletions
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llvm/test/CodeGen/MIR/X86/expected-register-after-flags.mir
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# RUN: not llc -march=x86-64 -start-after branch-folder -stop-after branch-folder -o /dev/null %s 2>&1 | FileCheck %s | ||
# This test ensures that an error is reported when a register operand doesn't | ||
# follow register flags. | ||
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--- | | ||
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define i32 @foo() { | ||
entry: | ||
ret i32 0 | ||
} | ||
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... | ||
--- | ||
name: foo | ||
body: | ||
- id: 0 | ||
name: entry | ||
instructions: | ||
# CHECK: [[@LINE+1]]:37: expected a register after register flags | ||
- '%eax = MOV32r0 implicit-def 2' | ||
- 'RETQ %eax' | ||
... |
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# RUN: llc -march=x86-64 -start-after branch-folder -stop-after branch-folder -o /dev/null %s | FileCheck %s | ||
# This test ensures that the MIR parser parses the 'implicit' and 'implicit-def' | ||
# register flags correctly. | ||
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--- | | ||
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define i32 @foo(i32 %a) { | ||
entry: | ||
%0 = icmp sle i32 %a, 10 | ||
br i1 %0, label %less, label %exit | ||
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less: | ||
ret i32 0 | ||
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exit: | ||
ret i32 %a | ||
} | ||
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... | ||
--- | ||
name: foo | ||
body: | ||
- id: 0 | ||
name: entry | ||
instructions: | ||
# CHECK: - 'CMP32ri8 %edi, 10, implicit-def %eflags' | ||
# CHECK-NEXT: - 'JG_1 %bb.2.exit, implicit %eflags' | ||
- 'CMP32ri8 %edi, 10, implicit-def %eflags' | ||
- 'JG_1 %bb.2.exit, implicit %eflags' | ||
- id: 1 | ||
name: less | ||
instructions: | ||
# CHECK: - '%eax = MOV32r0 implicit-def %eflags' | ||
- '%eax = MOV32r0 implicit-def %eflags' | ||
- 'RETQ %eax' | ||
- id: 2 | ||
name: exit | ||
instructions: | ||
- '%eax = COPY %edi' | ||
- 'RETQ %eax' | ||
... |
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