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gerrit-public.fairphone.software / fp2-dev / platform / external / llvm / 9f23dee08c7052af2c4baae3e2b06518896742eb / . / test / CodeGen / Thumb2 / machine-licm.ll
blob: c298aa2dd936c7e43edaf77f7dce0e5ec7ff9323 [file] [log] [blame]
Evan Cheng9b824252009-11-20 02:10:27 +0000[diff] [blame]1; RUN: llc < %s -mtriple=thumbv7-apple-darwin -disable-fp-elim | FileCheck %s
2; RUN: llc < %s -mtriple=thumbv7-apple-darwin -relocation-model=pic -disable-fp-elim | FileCheck %s --check-prefix=PIC
Evan Cheng9eda6892009-10-31 03:39:36 +0000[diff] [blame]3; rdar://7353541
Evan Chengd457e6e2009-11-07 04:04:34 +0000[diff] [blame]4; rdar://7354376
Evan Cheng9eda6892009-10-31 03:39:36 +0000[diff] [blame]5
6; The generated code is no where near ideal. It's not recognizing the two
7; constantpool entries being loaded can be merged into one.
8
9@GV = external global i32 ; <i32*> [#uses=2]
10
11define arm_apcscc void @t(i32* nocapture %vals, i32 %c) nounwind {
12entry:
Evan Chengde17fb62009-10-31 23:46:45 +0000[diff] [blame]13; CHECK: t:
14; CHECK: cbz
Evan Cheng9eda6892009-10-31 03:39:36 +0000[diff] [blame]15 %0 = icmp eq i32 %c, 0 ; <i1> [#uses=1]
16 br i1 %0, label %return, label %bb.nph
17
18bb.nph: ; preds = %entry
19; CHECK: BB#1
Dan Gohman9f23dee2010-04-17 16:29:15 +0000[diff] [blame^]20; CHECK: ldr.n r2, LCPI0_0
Evan Chengc26abd92009-11-20 23:31:34 +0000[diff] [blame]21; CHECK: ldr r2, [r2]
Evan Chengfac4f1f2010-03-10 03:07:41 +0000[diff] [blame]22; CHECK: ldr r3, [r2]
Dan Gohman9f23dee2010-04-17 16:29:15 +0000[diff] [blame^]23; CHECK: LBB0_2
24; CHECK: LCPI0_0:
Evan Cheng78e5c112009-11-07 03:52:02 +0000[diff] [blame]25; CHECK-NOT: LCPI1_1:
26; CHECK: .section
Evan Cheng9b824252009-11-20 02:10:27 +0000[diff] [blame]27
28; PIC: BB#1
Dan Gohman9f23dee2010-04-17 16:29:15 +0000[diff] [blame^]29; PIC: ldr.n r2, LCPI0_0
Evan Cheng9b824252009-11-20 02:10:27 +0000[diff] [blame]30; PIC: add r2, pc
Evan Chengc26abd92009-11-20 23:31:34 +0000[diff] [blame]31; PIC: ldr r2, [r2]
Evan Chengfac4f1f2010-03-10 03:07:41 +0000[diff] [blame]32; PIC: ldr r3, [r2]
Dan Gohman9f23dee2010-04-17 16:29:15 +0000[diff] [blame^]33; PIC: LBB0_2
34; PIC: LCPI0_0:
35; PIC-NOT: LCPI0_1:
Evan Cheng9b824252009-11-20 02:10:27 +0000[diff] [blame]36; PIC: .section
Evan Cheng9eda6892009-10-31 03:39:36 +0000[diff] [blame]37 %.pre = load i32* @GV, align 4 ; <i32> [#uses=1]
38 br label %bb
39
40bb: ; preds = %bb, %bb.nph
41 %1 = phi i32 [ %.pre, %bb.nph ], [ %3, %bb ] ; <i32> [#uses=1]
42 %i.03 = phi i32 [ 0, %bb.nph ], [ %4, %bb ] ; <i32> [#uses=2]
43 %scevgep = getelementptr i32* %vals, i32 %i.03 ; <i32*> [#uses=1]
44 %2 = load i32* %scevgep, align 4 ; <i32> [#uses=1]
45 %3 = add nsw i32 %1, %2 ; <i32> [#uses=2]
46 store i32 %3, i32* @GV, align 4
47 %4 = add i32 %i.03, 1 ; <i32> [#uses=2]
48 %exitcond = icmp eq i32 %4, %c ; <i1> [#uses=1]
49 br i1 %exitcond, label %return, label %bb
50
51return: ; preds = %bb, %entry
52 ret void
53}