35 lines
1.0 KiB
LLVM
35 lines
1.0 KiB
LLVM
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; RUN: llc -O2 -march=bpfel -mcpu=v2 -mattr=+alu32 < %s | FileCheck %s
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;
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; For the below test case, 'b' in 'ret == b' needs SLL/SLR.
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; 'ret' in 'ret == b' does not need SLL/SLR as all 'ret' values
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; are assigned through 'w<reg> = <value>' alu32 operations.
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;
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; extern int helper(int);
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; int test(int a, int b, int c, int d) {
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; int ret;
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; if (a < b)
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; ret = (c < d) ? -1 : 0;
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; else
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; ret = (c < a) ? 1 : 2;
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; return helper(ret == b);
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; }
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define dso_local i32 @test(i32 %a, i32 %b, i32 %c, i32 %d) local_unnamed_addr {
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entry:
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%cmp = icmp slt i32 %a, %b
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%cmp1 = icmp slt i32 %c, %d
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%cond = sext i1 %cmp1 to i32
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%cmp2 = icmp slt i32 %c, %a
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%cond3 = select i1 %cmp2, i32 1, i32 2
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%ret.0 = select i1 %cmp, i32 %cond, i32 %cond3
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%cmp4 = icmp eq i32 %ret.0, %b
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%conv = zext i1 %cmp4 to i32
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%call = tail call i32 @helper(i32 %conv)
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ret i32 %call
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}
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; CHECK: r{{[0-9]+}} = w{{[0-9]+}}
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; CHECK-NOT: r{{[0-9]+}} >>= 32
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; CHECK: if r{{[0-9]+}} == r{{[0-9]+}} goto
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declare dso_local i32 @helper(i32) local_unnamed_addr
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