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to the instruction position. The old encoding would give an absolute ID which counts up within a function, and only resets at the next function. I.e., Instead of having: ... = icmp eq i32 n-1, n-2 br i1 ..., label %bb1, label %bb2 it will now be roughly: ... = icmp eq i32 1, 2 br i1 1, label %bb1, label %bb2 This makes it so that ids remain relatively small and can be encoded in fewer bits. With this encoding, forward reference operands will be given negative-valued IDs. Use signed VBRs for the most common case of forward references, which is phi instructions. To retain backward compatibility we bump the bitcode version from 0 to 1 to distinguish between the different encodings. llvm-svn: 165739
50 lines
1.3 KiB
LLVM
50 lines
1.3 KiB
LLVM
; Basic sanity test to check that instruction operands are encoded with
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; relative IDs.
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; RUN: llvm-as < %s | llvm-bcanalyzer -dump | FileCheck %s
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; CHECK: FUNCTION_BLOCK
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; CHECK: INST_BINOP {{.*}}op0=1 op1=1
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; CHECK: INST_BINOP {{.*}}op0=1 op1=1
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; CHECK: INST_BINOP {{.*}}op0=1 op1=1
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; CHECK: INST_RET {{.*}}op0=1
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define i32 @test_int_binops(i32 %a) nounwind {
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entry:
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%0 = add i32 %a, %a
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%1 = sub i32 %0, %0
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%2 = mul i32 %1, %1
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ret i32 %2
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}
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; CHECK: FUNCTION_BLOCK
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; CHECK: INST_CAST {{.*}}op0=1
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; CHECK: INST_BINOP {{.*}}op0=1 op1=1
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; CHECK: INST_BINOP {{.*}}op0=1 op1=1
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; CHECK: INST_BINOP {{.*}}op0=1 op1=1
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; CHECK: INST_BINOP {{.*}}op0=1 op1=1
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; CHECK: INST_RET {{.*}}op0=1
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define double @test_float_binops(i32 %a) nounwind {
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%1 = sitofp i32 %a to double
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%2 = fadd double %1, %1
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%3 = fsub double %2, %2
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%4 = fmul double %3, %3
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%5 = fdiv double %4, %4
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ret double %5
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}
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; CHECK: FUNCTION_BLOCK
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; skip checking operands of INST_INBOUNDS_GEP since that depends on ordering
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; between literals and the formal parameters.
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; CHECK: INST_INBOUNDS_GEP {{.*}}
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; CHECK: INST_LOAD {{.*}}op0=1 {{.*}}
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; CHECK: INST_CMP2 op0=1 {{.*}}
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; CHECK: INST_RET {{.*}}op0=1
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define i1 @test_load(i32 %a, {i32, i32}* %ptr) nounwind {
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entry:
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%0 = getelementptr inbounds {i32, i32}* %ptr, i32 %a, i32 0
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%1 = load i32* %0
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%2 = icmp eq i32 %1, %a
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ret i1 %2
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}
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