forked from OSchip/llvm-project
[FastISel] fix a fallback diagnostic.
Summary: FastISel was marked as failed in case instruction selection succeeded. Reviewers: qcolombet, zvi, rovka, ab Reviewed By: zvi Subscribers: javed.absar, ab, qcolombet, bogner, llvm-commits Differential Revision: https://reviews.llvm.org/D34438 llvm-svn: 307489
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@ -1483,7 +1483,6 @@ void SelectionDAGISel::SelectAllBasicBlocks(const Function &Fn) {
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// Try to select the instruction with FastISel.
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if (FastIS->selectInstruction(Inst)) {
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FastISelFailed = true;
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--NumFastIselRemaining;
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++NumFastIselSuccess;
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// If fast isel succeeded, skip over all the folded instructions, and
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@ -1506,6 +1505,8 @@ void SelectionDAGISel::SelectAllBasicBlocks(const Function &Fn) {
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continue;
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}
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FastISelFailed = true;
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// Then handle certain instructions as single-LLVM-Instruction blocks.
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// We cannot separate out GCrelocates to their own blocks since we need
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// to keep track of gc-relocates for a particular gc-statepoint. This is
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@ -1,4 +1,4 @@
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; RUN: llc -fast-isel -o - %s -fast-isel-report-on-fallback 2>&1 | FileCheck %s
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; RUN: llc -fast-isel -o - %s -fast-isel-report-on-fallback -pass-remarks-missed=isel 2>&1 | FileCheck %s
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; Make sure FastISel report a warming when we asked it to do so.
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; Note: This test needs to use whatever is not supported by FastISel.
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; Thus, this test may fail because inline asm gets supported in FastISel.
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@ -6,9 +6,26 @@
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx"
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; CHECK: remark: <unknown>:0:0: FastISel missed call: call void asm sideeffect
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; CHECK: warning: Instruction selection used fallback path for foo
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define void @foo(){
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entry:
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call void asm sideeffect "nop", "~{dirflag},~{fpsr},~{flags}"()
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ret void
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}
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; CHECK: remark: <unknown>:0:0: FastISel missed: store i128
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; CHECK: warning: Instruction selection used fallback path for test_instruction_fallback
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define void @test_instruction_fallback(i128* %ptr){
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%v1 = load i128, i128* %ptr
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%result = add i128 %v1, %v1
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store i128 %result, i128 * %ptr
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ret void
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}
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; CHECK-NOT: remark: <unknown>:0:0: FastISel missed
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; CHECK-NOT: warning: Instruction selection used fallback path for test_instruction_not_fallback
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define i32 @test_instruction_not_fallback(i32 %a){
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%result = add i32 %a, %a
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ret i32 %result
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}
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