122b0220fd
The data layout strings do not have any effect on llc tests and will become misleadingly out of date as we continue to update the canonical data layout, so remove them from the tests. Differential Revision: https://reviews.llvm.org/D105842
77 lines
2.2 KiB
LLVM
77 lines
2.2 KiB
LLVM
; RUN: llc < %s -asm-verbose=false -verify-machineinstrs | FileCheck %s
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;; Test that a small but nontrivial switch in a loop (like in a
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;; bytecode interpreter) lowers reasonably without any irreducible
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;; control flow being introduced.
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target triple = "wasm32"
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declare void @a(i32*)
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declare void @b(i32*)
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; CHECK-LABEL: switch_in_loop:
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; CHECK-NEXT: .functype switch_in_loop (i32, i32) -> (i32)
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; CHECK: global.get __stack_pointer
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; CHECK: global.set __stack_pointer
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; CHECK: block
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; CHECK: br_if 0
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; CHECK: .LBB0_2:
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; CHECK: loop
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; CHECK: block
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; CHECK: block
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; CHECK: block
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; CHECK: br_table {0, 1, 2}
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; CHECK: .LBB0_3:
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; CHECK: end_block
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; CHECK: call a
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; CHECK: br 1
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; CHECK: .LBB0_4:
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; CHECK: end_block
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; CHECK: call b
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; CHECK: .LBB0_5:
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; CHECK: end_block
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; CHECK: br_if 0
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; CHECK: end_loop
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; CHECK: .LBB0_7:
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; CHECK: end_block
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; CHECK: global.set __stack_pointer
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; CHECK: end_function
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define i32 @switch_in_loop(i32* %ops, i32 %len) {
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entry:
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%res = alloca i32
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%0 = bitcast i32* %res to i8*
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store i32 0, i32* %res
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%cmp6 = icmp sgt i32 %len, 0
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br i1 %cmp6, label %for.body, label %for.cond.cleanup
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for.cond.cleanup.loopexit: ; preds = %sw.epilog
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%.pre = load i32, i32* %res
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br label %for.cond.cleanup
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for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit, %entry
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%1 = phi i32 [ %.pre, %for.cond.cleanup.loopexit ], [ 0, %entry ]
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ret i32 %1
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for.body: ; preds = %entry, %sw.epilog
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%i.07 = phi i32 [ %inc, %sw.epilog ], [ 0, %entry ]
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%arrayidx = getelementptr inbounds i32, i32* %ops, i32 %i.07
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%2 = load i32, i32* %arrayidx
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switch i32 %2, label %sw.epilog [
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i32 0, label %sw.bb
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i32 1, label %sw.bb1
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]
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sw.bb: ; preds = %for.body
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call void @a(i32* nonnull %res)
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br label %sw.epilog
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sw.bb1: ; preds = %for.body
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call void @b(i32* nonnull %res)
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br label %sw.epilog
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sw.epilog: ; preds = %for.body, %sw.bb1, %sw.bb
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%inc = add nuw nsw i32 %i.07, 1
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%exitcond = icmp eq i32 %inc, %len
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br i1 %exitcond, label %for.cond.cleanup.loopexit, label %for.body
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}
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