39 lines
1.3 KiB
LLVM
39 lines
1.3 KiB
LLVM
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; RUN: opt -loop-unroll -S -mtriple arm-none-eabi -mcpu=cortex-m7 %s | FileCheck %s -check-prefix=UNROLL
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; This test is meant to check that this loop is unrolled into three iterations.
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; UNROLL-LABEL: @test
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; UNROLL: load i32, i32*
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; UNROLL: load i32, i32*
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; UNROLL: load i32, i32*
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; UNROLL-NOT: load i32, i32*
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define void @test(i32* %x, i32 %n) {
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entry:
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%sub = add nsw i32 %n, -1
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%rem = srem i32 %sub, 4
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%cmp7 = icmp sgt i32 %rem, 0
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br i1 %cmp7, label %while.body, label %while.end
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while.body: ; preds = %entry, %if.end
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%x.addr.09 = phi i32* [ %incdec.ptr, %if.end ], [ %x, %entry ]
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%n.addr.08 = phi i32 [ %dec, %if.end ], [ %rem, %entry ]
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%0 = load i32, i32* %x.addr.09, align 4
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%cmp1 = icmp slt i32 %0, 10
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br i1 %cmp1, label %if.then, label %if.end
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if.then: ; preds = %while.body
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store i32 0, i32* %x.addr.09, align 4
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br label %if.end
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if.end: ; preds = %if.then, %while.body
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%incdec.ptr = getelementptr inbounds i32, i32* %x.addr.09, i32 1
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%dec = add nsw i32 %n.addr.08, -1
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%cmp = icmp sgt i32 %dec, 0
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br i1 %cmp, label %while.body, label %while.end
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while.end: ; preds = %if.end, %entry
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ret void
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}
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