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https://github.com/c64scene-ar/llvm-6502.git
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2a90e446c0
SALU instructions ignore control flow, so it is not always safe to use them within branches. This is a partial solution to this problem until we can come up with something better. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207590 91177308-0d34-0410-b5e6-96231b3b80d8
28 lines
602 B
LLVM
28 lines
602 B
LLVM
; RUN: llc -march=r600 -mcpu=SI -verify-machineinstrs< %s | FileCheck -check-prefix=SI %s
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;
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;
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; Most SALU instructions ignore control flow, so we need to make sure
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; they don't overwrite values from other blocks.
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; SI-NOT: S_ADD
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define void @sgpr_if_else(i32 addrspace(1)* %out, i32 %a, i32 %b, i32 %c, i32 %d, i32 %e) {
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entry:
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%0 = icmp eq i32 %a, 0
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br i1 %0, label %if, label %else
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if:
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%1 = add i32 %b, %c
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br label %endif
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else:
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%2 = add i32 %d, %e
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br label %endif
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endif:
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%3 = phi i32 [%1, %if], [%2, %else]
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%4 = add i32 %3, %a
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store i32 %4, i32 addrspace(1)* %out
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ret void
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}
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