c5037db4ac
Similar to 806761a762
-mtriple= specifies the full target triple while -march= merely sets the
architecture part of the default target triple (e.g. Windows, macOS),
leaving a target triple which may not make sense.
Therefore, -march= is error-prone and not recommended for tests without
a target triple. The issue has been benign as we recognize
bpf*-apple-darwin as ELF instead of rejecting it outrightly.
41 lines
1.1 KiB
LLVM
41 lines
1.1 KiB
LLVM
; RUN: llc < %s -mtriple=bpf -mcpu=v1 -verify-machineinstrs | FileCheck %s
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; Source Code:
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; struct loc_prog {
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; unsigned int ip;
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; int len;
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; };
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; int exec_prog(struct loc_prog *prog) {
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; if (prog->ip < prog->len) {
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; int x = prog->ip;
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; if (x < 3)
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; prog->ip += 2;
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; }
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; return 3;
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; }
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; Compilation flag:
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; clang -target bpf -O2 -S -emit-llvm t.c
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%struct.loc_prog = type { i32, i32 }
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; Function Attrs: nofree norecurse nounwind willreturn
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define dso_local i32 @exec_prog(ptr nocapture %prog) local_unnamed_addr {
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entry:
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%0 = load i32, ptr %prog, align 4
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%len = getelementptr inbounds %struct.loc_prog, ptr %prog, i64 0, i32 1
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%1 = load i32, ptr %len, align 4
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%cmp = icmp ult i32 %0, %1
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%cmp2 = icmp slt i32 %0, 3
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%or.cond = and i1 %cmp2, %cmp
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; CHECK: r{{[0-9]+}} <<= 32
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; CHECK: r{{[0-9]+}} s>>= 32
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br i1 %or.cond, label %if.then3, label %if.end5
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if.then3: ; preds = %entry
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%add = add nsw i32 %0, 2
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store i32 %add, ptr %prog, align 4
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br label %if.end5
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if.end5: ; preds = %if.then3, %entry
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ret i32 3
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}
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