[llvm] 6634aef - [SCCP] Add test for predicate info condition handling (NFC)

[Nikita Popov via llvm-commits]

Author: Nikita Popov
Date: 2020-07-12T10:13:10+02:00
New Revision: 6634aef71f3b5e9820d2955bd6b39d2744de06eb

URL: https://github.com/llvm/llvm-project/commit/6634aef71f3b5e9820d2955bd6b39d2744de06eb
DIFF: https://github.com/llvm/llvm-project/commit/6634aef71f3b5e9820d2955bd6b39d2744de06eb.diff

LOG: [SCCP] Add test for predicate info condition handling (NFC)

Added: 
    llvm/test/Transforms/SCCP/predicateinfo-cond.ll

Modified: 
    

Removed: 
    


################################################################################
diff  --git a/llvm/test/Transforms/SCCP/predicateinfo-cond.ll b/llvm/test/Transforms/SCCP/predicateinfo-cond.ll
new file mode 100644
index 000000000000..d8528918babe
--- /dev/null
+++ b/llvm/test/Transforms/SCCP/predicateinfo-cond.ll
@@ -0,0 +1,110 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt -S -ipsccp < %s | FileCheck %s
+
+; Test that information about the true/false value of conditions themselves
+; is also used, not information implied by comparisions.
+
+define i32 @switch(i32 %x) {
+; CHECK-LABEL: @switch(
+; CHECK-NEXT:    switch i32 [[X:%.*]], label [[CASE_DEFAULT:%.*]] [
+; CHECK-NEXT:    i32 0, label [[CASE_0:%.*]]
+; CHECK-NEXT:    i32 2, label [[CASE_2:%.*]]
+; CHECK-NEXT:    ]
+; CHECK:       case.0:
+; CHECK-NEXT:    [[ADD:%.*]] = add i32 [[X]], 1
+; CHECK-NEXT:    br label [[END:%.*]]
+; CHECK:       case.2:
+; CHECK-NEXT:    [[SUB:%.*]] = sub i32 [[X]], 1
+; CHECK-NEXT:    br label [[END]]
+; CHECK:       case.default:
+; CHECK-NEXT:    br label [[END]]
+; CHECK:       end:
+; CHECK-NEXT:    [[PHI:%.*]] = phi i32 [ [[ADD]], [[CASE_0]] ], [ [[SUB]], [[CASE_2]] ], [ 1, [[CASE_DEFAULT]] ]
+; CHECK-NEXT:    ret i32 [[PHI]]
+;
+  switch i32 %x, label %case.default [
+  i32 0, label %case.0
+  i32 2, label %case.2
+  ]
+
+case.0:
+  %add = add i32 %x, 1
+  br label %end
+
+case.2:
+  %sub = sub i32 %x, 1
+  br label %end
+
+case.default:
+  br label %end
+
+end:
+  %phi = phi i32 [ %add, %case.0 ], [ %sub, %case.2 ], [ 1, %case.default]
+  ret i32 %phi
+}
+
+define i1 @assume(i32 %x) {
+; CHECK-LABEL: @assume(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp sge i32 [[X:%.*]], 0
+; CHECK-NEXT:    call void @llvm.assume(i1 [[CMP]])
+; CHECK-NEXT:    ret i1 [[CMP]]
+;
+  %cmp = icmp sge i32 %x, 0
+  call void @llvm.assume(i1 %cmp)
+  ret i1 %cmp
+}
+
+define i32 @branch(i32 %x) {
+; CHECK-LABEL: @branch(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp sge i32 [[X:%.*]], 0
+; CHECK-NEXT:    br i1 [[CMP]], label [[IF_THEN1:%.*]], label [[IF_THEN2:%.*]]
+; CHECK:       if.then1:
+; CHECK-NEXT:    br i1 [[CMP]], label [[IF2_THEN1:%.*]], label [[IF2_THEN2:%.*]]
+; CHECK:       if2.then1:
+; CHECK-NEXT:    br label [[IF2_END:%.*]]
+; CHECK:       if2.then2:
+; CHECK-NEXT:    br label [[IF2_END]]
+; CHECK:       if2.end:
+; CHECK-NEXT:    [[PHI:%.*]] = phi i32 [ 0, [[IF2_THEN1]] ], [ 1, [[IF2_THEN2]] ]
+; CHECK-NEXT:    ret i32 [[PHI]]
+; CHECK:       if.then2:
+; CHECK-NEXT:    br i1 [[CMP]], label [[IF3_THEN1:%.*]], label [[IF3_THEN2:%.*]]
+; CHECK:       if3.then1:
+; CHECK-NEXT:    br label [[IF3_END:%.*]]
+; CHECK:       if3.then2:
+; CHECK-NEXT:    br label [[IF3_END]]
+; CHECK:       if3.end:
+; CHECK-NEXT:    [[PHI2:%.*]] = phi i32 [ 0, [[IF3_THEN1]] ], [ 1, [[IF3_THEN2]] ]
+; CHECK-NEXT:    ret i32 [[PHI2]]
+;
+  %cmp = icmp sge i32 %x, 0
+  br i1 %cmp, label %if.then1, label %if.then2
+
+if.then1:
+  br i1 %cmp, label %if2.then1, label %if2.then2
+
+if2.then1:
+  br label %if2.end
+
+if2.then2:
+  br label %if2.end
+
+if2.end:
+  %phi = phi i32 [ 0, %if2.then1 ], [ 1, %if2.then2 ]
+  ret i32 %phi
+
+if.then2:
+  br i1 %cmp, label %if3.then1, label %if3.then2
+
+if3.then1:
+  br label %if3.end
+
+if3.then2:
+  br label %if3.end
+
+if3.end:
+  %phi2 = phi i32 [ 0, %if3.then1 ], [ 1, %if3.then2 ]
+  ret i32 %phi2
+}
+
+declare void @llvm.assume(i1)