105 lines
3.5 KiB
LLVM
105 lines
3.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=x86_64-pc-linux-gnu | FileCheck %s -check-prefixes=CHECK,ALIGN
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; RUN: llc < %s -mtriple=x86_64-pc-linux-gnu -align-loops=32 | FileCheck %s -check-prefixes=CHECK,ALIGN32
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; RUN: llc < %s -mtriple=x86_64-pc-linux-gnu -align-loops=256 | FileCheck %s -check-prefixes=CHECK,ALIGN256
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; This test is to check if .p2align can be correctly generated by considerring
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; 1. -align-loops=N from llc option
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; 2. loop metadata node !{!"llvm.loop.align", i32 64}
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; The test IR is generated from below simple C file:
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; $ clang -S -emit-llvm loop.c
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; $ cat loop.c
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; void bar(void);
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; void var(void);
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; void foo(int a) {
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; for (int i = 0; i < a; ++i)
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; bar();
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; for (int i = 0; i < a; ++i)
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; var();
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; }
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; The difference between test1 and test2 is test2 only set one loop metadata node for the second loop.
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; CHECK-LABEL: test1:
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; ALIGN: .p2align 6, 0x90
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; ALIGN-NEXT: .LBB0_2: # %for.body
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; ALIGN: .p2align 9, 0x90
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; ALIGN-NEXT: .LBB0_3: # %for.body
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; ALIGN32: .p2align 6, 0x90
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; ALIGN32-NEXT: .LBB0_2: # %for.body
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; ALIGN32: .p2align 9, 0x90
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; ALIGN32-NEXT: .LBB0_3: # %for.body
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; ALIGN256: .p2align 8, 0x90
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; ALIGN256-NEXT: .LBB0_2: # %for.body
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; ALIGN256: .p2align 9, 0x90
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; ALIGN256-NEXT: .LBB0_3: # %for.body
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define void @test1(i32 %a) nounwind {
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entry:
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%cmp12 = icmp sgt i32 %a, 0
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br i1 %cmp12, label %for.body, label %for.cond.cleanup4
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for.body: ; preds = %entry, %for.body
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%i.013 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
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tail call void @bar()
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%inc = add nuw nsw i32 %i.013, 1
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%exitcond.not = icmp eq i32 %inc, %a
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br i1 %exitcond.not, label %for.body5, label %for.body, !llvm.loop !0
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for.cond.cleanup4: ; preds = %for.body5, %entry
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ret void
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for.body5: ; preds = %for.body, %for.body5
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%i1.015 = phi i32 [ %inc7, %for.body5 ], [ 0, %for.body ]
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tail call void @var()
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%inc7 = add nuw nsw i32 %i1.015, 1
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%exitcond16.not = icmp eq i32 %inc7, %a
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br i1 %exitcond16.not, label %for.cond.cleanup4, label %for.body5, !llvm.loop !2
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}
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; CHECK-LABEL: test2:
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; ALIGN: .p2align 4, 0x90
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; ALIGN-NEXT: .LBB1_2: # %for.body
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; ALIGN: .p2align 9, 0x90
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; ALIGN-NEXT: .LBB1_3: # %for.body
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; ALIGN32: .p2align 5, 0x90
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; ALIGN32-NEXT: .LBB1_2: # %for.body
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; ALIGN32: .p2align 9, 0x90
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; ALIGN32-NEXT: .LBB1_3: # %for.body
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; ALIGN256: .p2align 8, 0x90
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; ALIGN256-NEXT: .LBB1_2: # %for.body
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; ALIGN256: .p2align 9, 0x90
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; ALIGN256-NEXT: .LBB1_3: # %for.body
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define void @test2(i32 %a) nounwind {
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entry:
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%cmp12 = icmp sgt i32 %a, 0
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br i1 %cmp12, label %for.body, label %for.cond.cleanup4
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for.body: ; preds = %entry, %for.body
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%i.013 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
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tail call void @bar()
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%inc = add nuw nsw i32 %i.013, 1
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%exitcond.not = icmp eq i32 %inc, %a
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br i1 %exitcond.not, label %for.body5, label %for.body
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for.cond.cleanup4: ; preds = %for.body5, %entry
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ret void
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for.body5: ; preds = %for.body, %for.body5
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%i1.015 = phi i32 [ %inc7, %for.body5 ], [ 0, %for.body ]
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tail call void @var()
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%inc7 = add nuw nsw i32 %i1.015, 1
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%exitcond16.not = icmp eq i32 %inc7, %a
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br i1 %exitcond16.not, label %for.cond.cleanup4, label %for.body5, !llvm.loop !2
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}
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declare void @bar()
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declare void @var()
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!0 = distinct !{!0, !1}
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!1 = !{!"llvm.loop.align", i32 64}
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!2 = distinct !{!2, !3}
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!3 = !{!"llvm.loop.align", i32 512}
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