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61 lines
2.0 KiB
LLVM
61 lines
2.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s | FileCheck %s
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target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64"
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target triple = "thumbv6m-arm-none-eabi"
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; From https://reviews.llvm.org/D62266
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; This used to cause an endless loop in DAGCombine,
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; since we were hoisting two binops with constants, one constant being opaque,
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; which is why they weren't getting constant folded.
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@a = dso_local local_unnamed_addr global i32 0, align 4
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@b = dso_local local_unnamed_addr global i32 0, align 4
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; Function Attrs: minsize nounwind optsize
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define dso_local i32 @c() local_unnamed_addr #0 {
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; CHECK-LABEL: c:
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; CHECK: @ %bb.0: @ %entry
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; CHECK-NEXT: .save {r4, lr}
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; CHECK-NEXT: push {r4, lr}
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; CHECK-NEXT: ldr r0, .LCPI0_0
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; CHECK-NEXT: ldr r0, [r0]
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; CHECK-NEXT: ldr r4, .LCPI0_1
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; CHECK-NEXT: subs r0, r4, r0
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; CHECK-NEXT: adds r0, r0, #1
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; CHECK-NEXT: bl d
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; CHECK-NEXT: ldr r0, .LCPI0_2
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; CHECK-NEXT: ldr r0, [r0]
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; CHECK-NEXT: cmp r0, r4
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; CHECK-NEXT: ble .LBB0_2
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; CHECK-NEXT: @ %bb.1: @ %if.then
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; CHECK-NEXT: bl e
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; CHECK-NEXT: .LBB0_2: @ %if.end
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; CHECK-NEXT: pop {r4, pc}
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; CHECK-NEXT: .p2align 2
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; CHECK-NEXT: @ %bb.3:
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; CHECK-NEXT: .LCPI0_0:
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; CHECK-NEXT: .long a
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; CHECK-NEXT: .LCPI0_1:
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; CHECK-NEXT: .long 1999 @ 0x7cf
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; CHECK-NEXT: .LCPI0_2:
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; CHECK-NEXT: .long b
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entry:
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%0 = load i32, i32* @a, align 4
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%sub = sub nsw i32 2000, %0
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%call = tail call i32 bitcast (i32 (...)* @d to i32 (i32)*)(i32 %sub) #2
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%1 = load i32, i32* @b, align 4
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%cmp = icmp sgt i32 %1, 1999
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br i1 %cmp, label %if.then, label %if.end
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if.then: ; preds = %entry
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%call1 = tail call i32 bitcast (i32 (...)* @e to i32 ()*)() #2
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br label %if.end
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if.end: ; preds = %if.then, %entry
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ret i32 undef
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}
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declare dso_local i32 @d(...) local_unnamed_addr #1
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declare dso_local i32 @e(...) local_unnamed_addr #1
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