forked from OSchip/llvm-project
220 lines
6.3 KiB
LLVM
220 lines
6.3 KiB
LLVM
; RUN: llc < %s -asm-verbose=false -verify-machineinstrs -disable-block-placement -wasm-disable-explicit-locals -wasm-keep-registers | FileCheck %s
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; Test irreducible CFG handling.
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target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
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target triple = "wasm32-unknown-unknown"
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; A simple loop with two entries.
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; CHECK-LABEL: test0:
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; CHECK: f64.load
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; CHECK: i32.const $[[REG:[^,]+]]=
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; CHECK: br_table $[[REG]],
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define void @test0(double* %arg, i32 %arg1, i32 %arg2, i32 %arg3) {
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bb:
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%tmp = icmp eq i32 %arg2, 0
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br i1 %tmp, label %bb6, label %bb3
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bb3:
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%tmp4 = getelementptr double, double* %arg, i32 %arg3
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%tmp5 = load double, double* %tmp4, align 4
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br label %bb13
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bb6:
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%tmp7 = phi i32 [ %tmp18, %bb13 ], [ 0, %bb ]
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%tmp8 = icmp slt i32 %tmp7, %arg1
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br i1 %tmp8, label %bb9, label %bb19
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bb9:
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%tmp10 = getelementptr double, double* %arg, i32 %tmp7
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%tmp11 = load double, double* %tmp10, align 4
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%tmp12 = fmul double %tmp11, 2.300000e+00
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store double %tmp12, double* %tmp10, align 4
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br label %bb13
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bb13:
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%tmp14 = phi double [ %tmp5, %bb3 ], [ %tmp12, %bb9 ]
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%tmp15 = phi i32 [ undef, %bb3 ], [ %tmp7, %bb9 ]
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%tmp16 = getelementptr double, double* %arg, i32 %tmp15
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%tmp17 = fadd double %tmp14, 1.300000e+00
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store double %tmp17, double* %tmp16, align 4
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%tmp18 = add nsw i32 %tmp15, 1
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br label %bb6
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bb19:
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ret void
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}
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; A simple loop with two entries and an inner natural loop.
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; CHECK-LABEL: test1:
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; CHECK: f64.load
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; CHECK: i32.const $[[REG:[^,]+]]=
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; CHECK: br_table $[[REG]],
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define void @test1(double* %arg, i32 %arg1, i32 %arg2, i32 %arg3) {
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bb:
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%tmp = icmp eq i32 %arg2, 0
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br i1 %tmp, label %bb6, label %bb3
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bb3:
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%tmp4 = getelementptr double, double* %arg, i32 %arg3
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%tmp5 = load double, double* %tmp4, align 4
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br label %bb13
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bb6:
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%tmp7 = phi i32 [ %tmp18, %bb13 ], [ 0, %bb ]
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%tmp8 = icmp slt i32 %tmp7, %arg1
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br i1 %tmp8, label %bb9, label %bb19
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bb9:
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%tmp10 = getelementptr double, double* %arg, i32 %tmp7
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%tmp11 = load double, double* %tmp10, align 4
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%tmp12 = fmul double %tmp11, 2.300000e+00
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store double %tmp12, double* %tmp10, align 4
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br label %bb10
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bb10:
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%p = phi i32 [ 0, %bb9 ], [ %pn, %bb10 ]
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%pn = add i32 %p, 1
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%c = icmp slt i32 %pn, 256
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br i1 %c, label %bb10, label %bb13
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bb13:
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%tmp14 = phi double [ %tmp5, %bb3 ], [ %tmp12, %bb10 ]
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%tmp15 = phi i32 [ undef, %bb3 ], [ %tmp7, %bb10 ]
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%tmp16 = getelementptr double, double* %arg, i32 %tmp15
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%tmp17 = fadd double %tmp14, 1.300000e+00
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store double %tmp17, double* %tmp16, align 4
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%tmp18 = add nsw i32 %tmp15, 1
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br label %bb6
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bb19:
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ret void
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}
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; A simple loop 2 blocks that are both entries.
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; CHECK-LABEL: test2:
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; CHECK: br_if
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; CHECK: i32.const $[[REG:[^,]+]]=
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; CHECK: br_table $[[REG]],
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define internal i32 @test2(i32) noinline {
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entry:
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br label %A0
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A0:
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%a0a = tail call i32 @test2(i32 1)
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%a0b = icmp eq i32 %a0a, 0
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br i1 %a0b, label %A1, label %A2
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A1:
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%a1a = tail call i32 @test2(i32 2)
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%a1b = icmp eq i32 %a1a, 0
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br i1 %a1b, label %A1, label %A2
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A2:
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%a2a = tail call i32 @test2(i32 3)
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%a2b = icmp eq i32 %a2a, 0
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br i1 %a2b, label %A1, label %A2
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}
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; An interesting loop with inner loop and if-else structure too.
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; CHECK-LABEL: test3:
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; CHECK: br_if
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define void @test3(i32 %ws) {
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entry:
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%ws.addr = alloca i32, align 4
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store volatile i32 %ws, i32* %ws.addr, align 4
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%0 = load volatile i32, i32* %ws.addr, align 4
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%tobool = icmp ne i32 %0, 0
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br i1 %tobool, label %if.then, label %if.end
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if.then: ; preds = %entry
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br label %wynn
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if.end: ; preds = %entry
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%1 = load volatile i32, i32* %ws.addr, align 4
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%tobool1 = icmp ne i32 %1, 0
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br i1 %tobool1, label %if.end9, label %if.then2
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if.then2: ; preds = %if.end
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br label %for.cond
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for.cond: ; preds = %wynn, %if.then7, %if.then2
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%2 = load volatile i32, i32* %ws.addr, align 4
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%tobool3 = icmp ne i32 %2, 0
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br i1 %tobool3, label %if.then4, label %if.end5
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if.then4: ; preds = %for.cond
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br label %if.end5
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if.end5: ; preds = %if.then4, %for.cond
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%3 = load volatile i32, i32* %ws.addr, align 4
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%tobool6 = icmp ne i32 %3, 0
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br i1 %tobool6, label %if.then7, label %if.end8
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if.then7: ; preds = %if.end5
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br label %for.cond
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if.end8: ; preds = %if.end5
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br label %wynn
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wynn: ; preds = %if.end8, %if.then
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br label %for.cond
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if.end9: ; preds = %if.end
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ret void
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}
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; Multi-level irreducibility, after reducing in the main scope we must then
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; reduce in the inner loop that we just created.
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; CHECK: br_table
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; CHECK: br_table
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define void @pi_next() {
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entry:
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br i1 undef, label %sw.bb5, label %return
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sw.bb5: ; preds = %entry
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br i1 undef, label %if.then.i49, label %if.else.i52
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if.then.i49: ; preds = %sw.bb5
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br label %for.inc197.i
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if.else.i52: ; preds = %sw.bb5
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br label %for.cond57.i
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for.cond57.i: ; preds = %for.inc205.i, %if.else.i52
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store i32 0, i32* undef, align 4
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br label %for.cond65.i
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for.cond65.i: ; preds = %for.inc201.i, %for.cond57.i
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br i1 undef, label %for.body70.i, label %for.inc205.i
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for.body70.i: ; preds = %for.cond65.i
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br label %for.cond76.i
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for.cond76.i: ; preds = %for.inc197.i, %for.body70.i
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%0 = phi i32 [ %inc199.i, %for.inc197.i ], [ 0, %for.body70.i ]
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%cmp81.i = icmp slt i32 %0, 0
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br i1 %cmp81.i, label %for.body82.i, label %for.inc201.i
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for.body82.i: ; preds = %for.cond76.i
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br label %for.inc197.i
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for.inc197.i: ; preds = %for.body82.i, %if.then.i49
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%inc199.i = add nsw i32 undef, 1
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br label %for.cond76.i
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for.inc201.i: ; preds = %for.cond76.i
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br label %for.cond65.i
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for.inc205.i: ; preds = %for.cond65.i
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br label %for.cond57.i
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return: ; preds = %entry
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ret void
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}
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